CVE & CISA-KEV CatalogNVD
CVE-2026-44727
MEDIUM5.4
CVSS v3
Description
Jupyter Server is the backend for Jupyter web applications. Prior to 2.20, the nbconvert HTTP handlers in jupyter_server render user-authored notebook HTML under the Jupyter origin without a sandbox directive in their Content-Security-Policy. Combined with nbconvert.HTMLExporter's default non-sanitizing behavior, a notebook carrying an HTML payload in a display_data output triggers stored XSS with cookie access, full /api/* authority, and kernel RCE. This vulnerability is fixed in 2.20.
How to fix
Remediation Available
jupyter-serverDebian
Fixed in:2.20.0-1CVE-2026-44727
registry.redhat.io/mta/mtaRocky
Fixed in:rhel9-operator@sha256:3926f791376886972749cae0f8eb635af67a088811214066c6deb010c6b762f0_amd64RHSA-2026:43038
Fixed in:hub-rhel9@sha256:0223927b9e584f302aabafdbf015a779b14c9b5816cf0baa0cb1bfe0b1cc3415_arm64RHSA-2026:43038
Fixed in:ui-rhel9@sha256:f59dcacb1eed9bcd539bc6c26a630115cf35378d77075247fb42219836e2adb7_arm64RHSA-2026:43038
Fixed in:cli-rhel9@sha256:ecae0c1053637d609a19773757c0ea8b336b645950a42473015daabfe9677fab_arm64RHSA-2026:43038
Fixed in:operator-bundle@sha256:94f88bf557a036c54b348c2689c699a720d5d347b1bba141feec273e624ccdbf_amd64RHSA-2026:43038
Fixed in:ui-rhel9@sha256:a77f5a731c20943958b5f654bf3147b690d5dd608b794bff261a23dd89f785f1_amd64RHSA-2026:43038
Fixed in:rhel9-operator@sha256:957a553608cbf9ed108c22f851ef809ed348cf592610851c3a554f3342ba511a_arm64RHSA-2026:43038
Fixed in:cli-rhel9@sha256:d466bf042711b13fc53cbc561b70e4f58cd77f8a05d1d4ee10c10a6e1c201fe7_amd64RHSA-2026:43038
registry.redhat.io/mta/mtaRed Hat / RHEL
Fixed in:cli-rhel9@sha256:ecae0c1053637d609a19773757c0ea8b336b645950a42473015daabfe9677fab_arm64RHSA-2026:43038
Fixed in:cli-rhel9@sha256:d466bf042711b13fc53cbc561b70e4f58cd77f8a05d1d4ee10c10a6e1c201fe7_amd64RHSA-2026:43038
Fixed in:hub-rhel9@sha256:0223927b9e584f302aabafdbf015a779b14c9b5816cf0baa0cb1bfe0b1cc3415_arm64RHSA-2026:43038
Fixed in:ui-rhel9@sha256:f59dcacb1eed9bcd539bc6c26a630115cf35378d77075247fb42219836e2adb7_arm64RHSA-2026:43038
Fixed in:hub-rhel9@sha256:2e251b0343327f2ac6e60d2888da526be6a82a355310f1aea93011426cddc485_amd64RHSA-2026:43038
Fixed in:rhel9-operator@sha256:3926f791376886972749cae0f8eb635af67a088811214066c6deb010c6b762f0_amd64RHSA-2026:43038
Fixed in:ui-rhel9@sha256:a77f5a731c20943958b5f654bf3147b690d5dd608b794bff261a23dd89f785f1_amd64RHSA-2026:43038
Fixed in:operator-bundle@sha256:94f88bf557a036c54b348c2689c699a720d5d347b1bba141feec273e624ccdbf_amd64RHSA-2026:43038
registry.redhat.io/mta/mta-analyzerRocky
Fixed in:addon-rhel9@sha256:1e20ac649ee7fdcdad9930b1f0384e10c8794db9a2f211d4e3d1679c0c10cc53_amd64RHSA-2026:43038
Fixed in:addon-rhel9@sha256:907c0c8c40c1fb494caa5feac439b90754160bf3f79d8e76cf2dded63f549db6_arm64RHSA-2026:43038
registry.redhat.io/mta/mta-analyzerRed Hat / RHEL
Fixed in:addon-rhel9@sha256:907c0c8c40c1fb494caa5feac439b90754160bf3f79d8e76cf2dded63f549db6_arm64RHSA-2026:43038
Fixed in:addon-rhel9@sha256:1e20ac649ee7fdcdad9930b1f0384e10c8794db9a2f211d4e3d1679c0c10cc53_amd64RHSA-2026:43038
registry.redhat.io/mta/mta-discoveryRocky
Fixed in:addon-rhel9@sha256:a72cbf7b2ba6420e31ecca15f7d3628a671dd642a6ccf4610c5a26462a5d4b36_amd64RHSA-2026:43038
Fixed in:addon-rhel9@sha256:7377a2c2f16ca436819cbbf106fc27d3a8c44c7fca0a44108ccc826bf8678ace_arm64RHSA-2026:43038
registry.redhat.io/mta/mta-discoveryRed Hat / RHEL
Fixed in:addon-rhel9@sha256:7377a2c2f16ca436819cbbf106fc27d3a8c44c7fca0a44108ccc826bf8678ace_arm64RHSA-2026:43038
Fixed in:addon-rhel9@sha256:a72cbf7b2ba6420e31ecca15f7d3628a671dd642a6ccf4610c5a26462a5d4b36_amd64RHSA-2026:43038
registry.redhat.io/mta/mta-dotnet-externalRed Hat / RHEL
Fixed in:provider-rhel9@sha256:794180378ddb9a88001d76b849df305034924683a79ef145f744fe03bee9c32b_amd64RHSA-2026:43038
Fixed in:provider-rhel9@sha256:b5d66f8d4c6d6680886e631296c927c9502817fbb823a680f1dabf1cc92e0465_arm64RHSA-2026:43038
registry.redhat.io/mta/mta-dotnet-externalRocky
Fixed in:provider-rhel9@sha256:794180378ddb9a88001d76b849df305034924683a79ef145f744fe03bee9c32b_amd64RHSA-2026:43038
Fixed in:provider-rhel9@sha256:b5d66f8d4c6d6680886e631296c927c9502817fbb823a680f1dabf1cc92e0465_arm64RHSA-2026:43038
registry.redhat.io/mta/mta-go-externalRed Hat / RHEL
Fixed in:provider-rhel9@sha256:8e5ba3659ef5f88b81c1c9d795b6af6048fd7d870493ce5f013efcb9fce90b9d_amd64RHSA-2026:43038
Fixed in:provider-rhel9@sha256:8f91d460985e1a97ac6892d26c0517f39871d94d1b3bfad005d58d424bed2b0b_arm64RHSA-2026:43038
registry.redhat.io/mta/mta-go-externalRocky
Fixed in:provider-rhel9@sha256:8e5ba3659ef5f88b81c1c9d795b6af6048fd7d870493ce5f013efcb9fce90b9d_amd64RHSA-2026:43038
Fixed in:provider-rhel9@sha256:8f91d460985e1a97ac6892d26c0517f39871d94d1b3bfad005d58d424bed2b0b_arm64RHSA-2026:43038
registry.redhat.io/mta/mta-java-externalRocky
Fixed in:provider-rhel9@sha256:60c4a45085db3517f6a9bae32a4b93fd2dfa799c3e957776ad2d8ab0777507c2_arm64RHSA-2026:43038
Fixed in:provider-rhel9@sha256:e8bd699e851fbab4466d1d25e3a08e2bcf8997978cb7f19f509c627be42d03dd_amd64RHSA-2026:43038
registry.redhat.io/mta/mta-java-externalRed Hat / RHEL
Fixed in:provider-rhel9@sha256:60c4a45085db3517f6a9bae32a4b93fd2dfa799c3e957776ad2d8ab0777507c2_arm64RHSA-2026:43038
Fixed in:provider-rhel9@sha256:e8bd699e851fbab4466d1d25e3a08e2bcf8997978cb7f19f509c627be42d03dd_amd64RHSA-2026:43038
registry.redhat.io/mta/mta-nodejs-externalRed Hat / RHEL
Fixed in:provider-rhel9@sha256:12883516af95bf0f6abad1556d22896f16a087c1e4191fedc1f5d689cf6d67f6_amd64RHSA-2026:43038
Fixed in:provider-rhel9@sha256:a89c4d19ff39a406f3279b4ffd6f8d2a2a82a78ab3e9aa1dc0f2c385a24fa844_arm64RHSA-2026:43038
registry.redhat.io/mta/mta-nodejs-externalRocky
Fixed in:provider-rhel9@sha256:a89c4d19ff39a406f3279b4ffd6f8d2a2a82a78ab3e9aa1dc0f2c385a24fa844_arm64RHSA-2026:43038
Fixed in:provider-rhel9@sha256:12883516af95bf0f6abad1556d22896f16a087c1e4191fedc1f5d689cf6d67f6_amd64RHSA-2026:43038
registry.redhat.io/mta/mta-platformRocky
Fixed in:addon-rhel9@sha256:647ca556be4338749fbe7cb18580466ce6155bfce17c96deda7b7c037fd16240_arm64RHSA-2026:43038
Fixed in:addon-rhel9@sha256:f421044ff3d6911097aebcbabfac87ddad74987e0e5f18a96dd89454f46a4cdf_amd64RHSA-2026:43038
registry.redhat.io/mta/mta-platformRed Hat / RHEL
Fixed in:addon-rhel9@sha256:647ca556be4338749fbe7cb18580466ce6155bfce17c96deda7b7c037fd16240_arm64RHSA-2026:43038
Fixed in:addon-rhel9@sha256:f421044ff3d6911097aebcbabfac87ddad74987e0e5f18a96dd89454f46a4cdf_amd64RHSA-2026:43038
registry.redhat.io/mta/mta-python-externalRocky
Fixed in:provider-rhel9@sha256:4f46867f5ff78e9e970bc572a1a625080ae8faea29dc098d3d7d4355e8350ca1_amd64RHSA-2026:43038
Fixed in:provider-rhel9@sha256:25618ee8a690f336e1604a1b1ca9dd5197bbdea5cd02cfaf588fbd950a8fd228_arm64RHSA-2026:43038
registry.redhat.io/mta/mta-python-externalRed Hat / RHEL
Fixed in:provider-rhel9@sha256:25618ee8a690f336e1604a1b1ca9dd5197bbdea5cd02cfaf588fbd950a8fd228_arm64RHSA-2026:43038
Fixed in:provider-rhel9@sha256:4f46867f5ff78e9e970bc572a1a625080ae8faea29dc098d3d7d4355e8350ca1_amd64RHSA-2026:43038
registry.redhat.io/mta/mta-solutionRed Hat / RHEL
Fixed in:server-rhel9@sha256:f8c8651cc5fa016003ef4105f28775e0b225472d2c3135e5f37d1e1f748c515e_arm64RHSA-2026:43038
Fixed in:server-rhel9@sha256:21fab4b77580795980fd60b24ab1d6a3cc159a9246beccd1c19938bca94edd23_amd64RHSA-2026:43038
registry.redhat.io/mta/mta-solutionRocky
Fixed in:server-rhel9@sha256:f8c8651cc5fa016003ef4105f28775e0b225472d2c3135e5f37d1e1f748c515e_arm64RHSA-2026:43038
Fixed in:server-rhel9@sha256:21fab4b77580795980fd60b24ab1d6a3cc159a9246beccd1c19938bca94edd23_amd64RHSA-2026:43038
registry.redhat.io/rhoai/odhRed Hat / RHEL
Fixed in:mlflow-rhel9@sha256:304991bad591fadfed03b7f56ff6c265a6416e2e13fe02129dc253db4e13092f_s390xRHSA-2026:60520
Fixed in:automl-rhel9@sha256:2d169d86c2e33636fbfce62d08d85e266bde276a7ea24ea205e921a9633e3008_s390xRHSA-2026:60520
Fixed in:trainer-rhel9@sha256:017d26624a3a3f0572d15d88967a47cb92f7e192ad9b57732499c71db3f273ec_ppc64leRHSA-2026:60520
Fixed in:autorag-rhel9@sha256:c7b9ca039c7ed15d23bd819cb6d6f45748cf2f86f7096ebc2db31b1d0f3c1e70_amd64RHSA-2026:60520
Fixed in:cli-rhel9@sha256:07f8ee936a6fc58fb75dd487034dbe308db6c2a566c340922aefba4bd66c7c92_arm64RHSA-2026:60520
Fixed in:autorag-rhel9@sha256:8404758b6b7609b6728f3d464560221bb0250e82406ec879cfcb50819e19f201_arm64RHSA-2026:60520
Fixed in:trainer-rhel9@sha256:06e474a7a837723be228244df55b97570d20eebc68565bbfc3334d03b9c218e0_amd64RHSA-2026:60520
Fixed in:automl-rhel9@sha256:11140a858c6fd3174d63e845f7d0bd451e67d50adc3befbfac57659d6334dfef_amd64RHSA-2026:60520
registry.redhat.io/rhoai/odhRocky
Fixed in:automl-rhel9@sha256:81087b35bd99aff8fc8db0918bc613b96e4d9a3eafff3a27078185c06412b6d1_arm64RHSA-2026:60520
Fixed in:rhel9-operator@sha256:3b8f50c575b12c8ce89d42bb72085e153aa564c28786dcdfaa5c89d6afe6d30c_ppc64leRHSA-2026:60520
Fixed in:trainer-rhel9@sha256:d9fad2be0c0aedeeb60d7eb477699da687f10893a69f96a1f7aa8727d4b111de_s390xRHSA-2026:60520
Fixed in:rhel9-operator@sha256:219d87a1f6d09f4d82e5c09d4dbd6e254229b986ccf8da9317fc5e948163b565_amd64RHSA-2026:60520
Fixed in:dashboard-rhel9@sha256:c7daef8e89de0e096983b72e81eeae966cea075874f1ddc498e0f92b9d5a278d_arm64RHSA-2026:60520
Fixed in:operator-bundle@sha256:a4a6034012ae72d42cdd8c9258caa15c41511b1ef6fb3f2268a5634761d71a6e_amd64RHSA-2026:60520
Fixed in:automl-rhel9@sha256:b49858f38add2b26168ac0437524cf9829cbbc4812e4fcd1347915da2df3afb8_ppc64leRHSA-2026:60520
Fixed in:trainer-rhel9@sha256:017d26624a3a3f0572d15d88967a47cb92f7e192ad9b57732499c71db3f273ec_ppc64leRHSA-2026:60520
registry.redhat.io/rhoai/odh-ai-gateway-payloadRocky
Fixed in:processing-rhel9@sha256:170e78670297c1c9435cff22c3f227edd58dc30993ebd0cb3d8265de838210af_arm64RHSA-2026:60520
Fixed in:processing-rhel9@sha256:617d5a2b3008ad195f6f26692ff9a8ee6ebb2a940b39b7245916af517b130a90_s390xRHSA-2026:60520
Fixed in:processing-rhel9@sha256:5cb9fb802c5439bd68d14df430144da061675fdd70f1b38a07284e0e5c8b3894_ppc64leRHSA-2026:60520
Fixed in:processing-rhel9@sha256:2f83d14f149aa832849e346b90fb4449ba3511bb56108cfeebe295b627c1cb80_amd64RHSA-2026:60520
registry.redhat.io/rhoai/odh-ai-gateway-payloadRed Hat / RHEL
Fixed in:processing-rhel9@sha256:170e78670297c1c9435cff22c3f227edd58dc30993ebd0cb3d8265de838210af_arm64RHSA-2026:60520
Fixed in:processing-rhel9@sha256:5cb9fb802c5439bd68d14df430144da061675fdd70f1b38a07284e0e5c8b3894_ppc64leRHSA-2026:60520
Fixed in:processing-rhel9@sha256:2f83d14f149aa832849e346b90fb4449ba3511bb56108cfeebe295b627c1cb80_amd64RHSA-2026:60520
Fixed in:processing-rhel9@sha256:617d5a2b3008ad195f6f26692ff9a8ee6ebb2a940b39b7245916af517b130a90_s390xRHSA-2026:60520
registry.redhat.io/rhoai/odh-built-inRocky
Fixed in:detector-rhel9@sha256:3037ef27d81723dbe3ca98bf55c5c93fff42f3fad5935559cbf6eb272778ed7f_ppc64leRHSA-2026:60520
Fixed in:detector-rhel9@sha256:bddfb02d685a2511cbf83bf8c6fba7872864b411adcb06d272bbfda89882883a_s390xRHSA-2026:60520
Fixed in:detector-rhel9@sha256:b017469cbd901503271b8944df40a74cf408c5223a880c696448f2b098b7c112_amd64RHSA-2026:60520
Fixed in:detector-rhel9@sha256:e7d23a7fa4026469af734196cc0f56d5fdadd79eb5d04bb77c152019356ab679_arm64RHSA-2026:60520
registry.redhat.io/rhoai/odh-built-inRed Hat / RHEL
Fixed in:detector-rhel9@sha256:b017469cbd901503271b8944df40a74cf408c5223a880c696448f2b098b7c112_amd64RHSA-2026:60520
Fixed in:detector-rhel9@sha256:bddfb02d685a2511cbf83bf8c6fba7872864b411adcb06d272bbfda89882883a_s390xRHSA-2026:60520
Fixed in:detector-rhel9@sha256:e7d23a7fa4026469af734196cc0f56d5fdadd79eb5d04bb77c152019356ab679_arm64RHSA-2026:60520
Fixed in:detector-rhel9@sha256:3037ef27d81723dbe3ca98bf55c5c93fff42f3fad5935559cbf6eb272778ed7f_ppc64leRHSA-2026:60520
registry.redhat.io/rhoai/odh-data-science-pipelines-argoRed Hat / RHEL
Fixed in:argoexec-rhel9@sha256:5b32f727afed4fe60f0c1f53d05bc0345e2b02c55c9882de10cb376366686461_arm64RHSA-2026:60520
Fixed in:argoexec-rhel9@sha256:775c307e1cfb3f68cfc081aafc9d968ace5ff88b5407e4365bb46d9ab7fcf609_amd64RHSA-2026:60520
Fixed in:argoexec-rhel9@sha256:9fa5ec6f9e81cb122f732887a065272bcd98448180923be0024c541bee75b7e1_ppc64leRHSA-2026:60520
Fixed in:workflowcontroller-rhel9@sha256:c8bcf379905652e7822492d03f18cbac2e92421055a6f760b8a3ec1ec712b6a1_ppc64leRHSA-2026:60520
Fixed in:workflowcontroller-rhel9@sha256:6838e7e122464c2a2afbc1ec7294c6bea54a59110cfcd090e17e462aa99050e7_amd64RHSA-2026:60520
Fixed in:workflowcontroller-rhel9@sha256:c9ccf4e8a33568b7dcc701f59d51b913607424bf95e8b51709911cf3e690db51_arm64RHSA-2026:60520
registry.redhat.io/rhoai/odh-data-science-pipelines-argoRocky
Fixed in:argoexec-rhel9@sha256:9fa5ec6f9e81cb122f732887a065272bcd98448180923be0024c541bee75b7e1_ppc64leRHSA-2026:60520
Fixed in:workflowcontroller-rhel9@sha256:c8bcf379905652e7822492d03f18cbac2e92421055a6f760b8a3ec1ec712b6a1_ppc64leRHSA-2026:60520
Fixed in:workflowcontroller-rhel9@sha256:6838e7e122464c2a2afbc1ec7294c6bea54a59110cfcd090e17e462aa99050e7_amd64RHSA-2026:60520
Fixed in:argoexec-rhel9@sha256:5b32f727afed4fe60f0c1f53d05bc0345e2b02c55c9882de10cb376366686461_arm64RHSA-2026:60520
Fixed in:argoexec-rhel9@sha256:775c307e1cfb3f68cfc081aafc9d968ace5ff88b5407e4365bb46d9ab7fcf609_amd64RHSA-2026:60520
Fixed in:workflowcontroller-rhel9@sha256:c9ccf4e8a33568b7dcc701f59d51b913607424bf95e8b51709911cf3e690db51_arm64RHSA-2026:60520
registry.redhat.io/rhoai/odh-data-science-pipelines-operatorRed Hat / RHEL
Fixed in:controller-rhel9@sha256:201cc48366e9650b4524b83352e72289bf62235a7ab9aa2903eb4ebee2ae83ee_arm64RHSA-2026:60520
Fixed in:controller-rhel9@sha256:ff7949a0e9c7e53332ef5b66d56b195b5857cb565cf7c77db7e371dc583b4f74_amd64RHSA-2026:60520
Fixed in:controller-rhel9@sha256:5fa73ac9806750dba8388a9b3087f44d3cc82f015e620defd84f2adfe0301d50_ppc64leRHSA-2026:60520
This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionRequired
ScopeChanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Exploit Intelligence
0.44%probability of exploitation in 30 days
37thpercentile
Low risk: more likely to be exploited than 37% of all known CVEs.
References
Related Vulnerabilities
Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2018-12998 | Medium | 6.1 | 99% | - | - |
| CVE-2020-11022 | Medium | 6.9 | 99% | - | Fix |
| CVE-2019-3929 | Critical | 9.8 | 99% | KEV | Fix |
| CVE-2020-9496 | Medium | 6.1 | 99% | - | - |
| CVE-2023-28341 | Medium | 6.1 | 99% | - | Fix |
| CVE-2021-25299 | Medium | 6.1 | 98% | - | - |
Common questions
How do I fix CVE-2026-44727?
Published advisories record a fix for 193 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2026-44727 being actively exploited?
Not that we know of. CVE-2026-44727 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.44% is the estimated probability that it will be exploited in the next 30 days. That is higher than 37% of all scored CVEs.
How severe is CVE-2026-44727?
CVE-2026-44727 has a CVSS v3 base score of 5.4, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-44727 affect?
Published advisories record a fix for jupyter-server (Debian), registry.redhat.io/mta/mta (Rocky), registry.redhat.io/mta/mta (Red Hat / RHEL), registry.redhat.io/mta/mta-analyzer (Rocky), and 189 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2026-44727
Markdown
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<a href="https://tridentstack.com/cve/CVE-2026-44727"><img src="https://tridentstack.com/cve/badge/CVE-2026-44727.svg" alt="CVE-2026-44727"></a>Find and fix vulnerabilities across your fleet
TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-28.