CVE-2026-42502

MEDIUM

6.1

CVSS v3

Description

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.

CWE-1021

How to fix

Remediation Available

golang-golang-x-netDebian

Fixed in:1:0.55.0-1CVE-2026-42502

osbuild-composerRocky

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

osbuild-composerRed Hat / RHEL

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

osbuild-composer-coreRocky

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

osbuild-composer-coreRed Hat / RHEL

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

osbuild-composer-core-debuginfoRocky

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

osbuild-composer-core-debuginfoRed Hat / RHEL

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

osbuild-composer-debuginfoRocky

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

osbuild-composer-debuginfoRed Hat / RHEL

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

osbuild-composer-debugsourceRed Hat / RHEL

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

osbuild-composer-debugsourceRocky

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

osbuild-composer-tests-debuginfoRocky

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

osbuild-composer-tests-debuginfoRed Hat / RHEL

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

osbuild-composer-workerRed Hat / RHEL

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

osbuild-composer-workerRocky

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

osbuild-composer-worker-debuginfoRocky

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

osbuild-composer-worker-debuginfoRed Hat / RHEL

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

Fixed in:0:101.3-4.el9_4.5RHSA-2026:59562

Fixed in:0:132.2-11.el9_6RHSA-2026:59560

registry.redhat.io/cert-manager/cert-manager-istioRocky

Fixed in:csr-rhel9@sha256:a32782599959e25eb2174dc87ea0d9e3a9c6daebf4f1fd6c4fb9204a10af885d_ppc64leRHSA-2026:54527

Fixed in:csr-rhel9@sha256:3df44c7ce6c8247cc36a057d48015803177dd651b10b74c6e80f43755afffa0a_arm64RHSA-2026:54527

Fixed in:csr-rhel9@sha256:4bc4f32e99ffff3a93dce000e9cb36c2cee6d576049bb36d5d91c8afda5eabad_s390xRHSA-2026:54527

Fixed in:csr-rhel9@sha256:6468289d06d9d44dccfd3928b7ae6fc7faa5748572357367d04a20d6403df8fa_amd64RHSA-2026:54527

registry.redhat.io/cert-manager/cert-manager-istioRed Hat / RHEL

Fixed in:csr-rhel9@sha256:a32782599959e25eb2174dc87ea0d9e3a9c6daebf4f1fd6c4fb9204a10af885d_ppc64leRHSA-2026:54527

Fixed in:csr-rhel9@sha256:6468289d06d9d44dccfd3928b7ae6fc7faa5748572357367d04a20d6403df8fa_amd64RHSA-2026:54527

Fixed in:csr-rhel9@sha256:3df44c7ce6c8247cc36a057d48015803177dd651b10b74c6e80f43755afffa0a_arm64RHSA-2026:54527

Fixed in:csr-rhel9@sha256:4bc4f32e99ffff3a93dce000e9cb36c2cee6d576049bb36d5d91c8afda5eabad_s390xRHSA-2026:54527

registry.redhat.io/cert-manager/jetstack-certRed Hat / RHEL

Fixed in:manager-rhel9@sha256:79091d478d6c09140474f2707e4dad555f393c9bdc866d567265b747ad7cc9a4_arm64RHSA-2026:54531

Fixed in:manager-rhel9@sha256:82461a011b7698c367b21a0866ac8c73a44fb3d5f21527cb34ed1495383207c2_amd64RHSA-2026:54531

Fixed in:manager-rhel9@sha256:60f97a1218b94ccb0e21bb5677bf906be3369b79ff81fa35050de1f4385027da_ppc64leRHSA-2026:54531

Fixed in:manager-rhel9@sha256:6dd44adc300558e1a9bee074347bc394e9335de4cab7ca3a32cc8a403cdad5dd_s390xRHSA-2026:54531

registry.redhat.io/cert-manager/jetstack-certRocky

Fixed in:manager-rhel9@sha256:82461a011b7698c367b21a0866ac8c73a44fb3d5f21527cb34ed1495383207c2_amd64RHSA-2026:54531

Fixed in:manager-rhel9@sha256:60f97a1218b94ccb0e21bb5677bf906be3369b79ff81fa35050de1f4385027da_ppc64leRHSA-2026:54531

Fixed in:manager-rhel9@sha256:79091d478d6c09140474f2707e4dad555f393c9bdc866d567265b747ad7cc9a4_arm64RHSA-2026:54531

Fixed in:manager-rhel9@sha256:6dd44adc300558e1a9bee074347bc394e9335de4cab7ca3a32cc8a403cdad5dd_s390xRHSA-2026:54531

registry.redhat.io/cert-manager/jetstack-cert-managerRocky

Fixed in:acmesolver-rhel9@sha256:a16ba6a9cb55a5c6e0743cf8d38742c346c22518e02c1e045b017bed380863b6_ppc64leRHSA-2026:54531

Fixed in:acmesolver-rhel9@sha256:0e4493d95443c137e4fe2e5b81cdf3d6a9b7b5d74c9162c3f32909a331dc07f2_amd64RHSA-2026:54531

Fixed in:acmesolver-rhel9@sha256:b574ad0711134be333ae87c25dcc910c5f4847ce454779eda9ea0125230777f3_s390xRHSA-2026:54531

Fixed in:acmesolver-rhel9@sha256:5074228e3df2095b082e468b4c99d285203313133e208ca1893b2ae966fbee90_arm64RHSA-2026:54531

registry.redhat.io/cert-manager/jetstack-cert-managerRed Hat / RHEL

Fixed in:acmesolver-rhel9@sha256:a16ba6a9cb55a5c6e0743cf8d38742c346c22518e02c1e045b017bed380863b6_ppc64leRHSA-2026:54531

Fixed in:acmesolver-rhel9@sha256:0e4493d95443c137e4fe2e5b81cdf3d6a9b7b5d74c9162c3f32909a331dc07f2_amd64RHSA-2026:54531

Fixed in:acmesolver-rhel9@sha256:b574ad0711134be333ae87c25dcc910c5f4847ce454779eda9ea0125230777f3_s390xRHSA-2026:54531

Fixed in:acmesolver-rhel9@sha256:5074228e3df2095b082e468b4c99d285203313133e208ca1893b2ae966fbee90_arm64RHSA-2026:54531

registry.redhat.io/compliance/openshift-file-integrityRed Hat / RHEL

Fixed in:rhel8-operator@sha256:25da62811e1ea81c6a39469173d9e2be2393f825dae053b77b137a2eca2e2b76_s390xRHSA-2026:54288

Fixed in:rhel8-operator@sha256:ad5f1c38a11e4164c26775e62d67b9361d798c93d0441f7f5f51605b2d140135_amd64RHSA-2026:54288

Fixed in:rhel8-operator@sha256:ceae8d1964727c09992eb9d353f7014bfb151f143b1ab04798d3d061f8a84e9f_ppc64leRHSA-2026:54288

Fixed in:operator-bundle@sha256:c38526d3744cb4f6b2487656c617a8bf40dd996d6e8ad903aa75a69050e290c8_amd64RHSA-2026:54288

registry.redhat.io/compliance/openshift-file-integrityRocky

Fixed in:rhel8-operator@sha256:ad5f1c38a11e4164c26775e62d67b9361d798c93d0441f7f5f51605b2d140135_amd64RHSA-2026:54288

Fixed in:operator-bundle@sha256:c38526d3744cb4f6b2487656c617a8bf40dd996d6e8ad903aa75a69050e290c8_amd64RHSA-2026:54288

Fixed in:rhel8-operator@sha256:25da62811e1ea81c6a39469173d9e2be2393f825dae053b77b137a2eca2e2b76_s390xRHSA-2026:54288

Fixed in:rhel8-operator@sha256:ceae8d1964727c09992eb9d353f7014bfb151f143b1ab04798d3d061f8a84e9f_ppc64leRHSA-2026:54288

registry.redhat.io/multiclusterRed Hat / RHEL

Fixed in:engine/work-rhel9@sha256:991c6ef2abc9f91e4ed1ea627aa58d639badf4cb48ac46ab6a4c4b83c8dec483_arm64RHSA-2026:57194

Fixed in:engine/discovery-rhel9@sha256:43850784416ed4c8ff8c41eb71382a4a4afb7804d57da0a151e9d90a30fc17e2_arm64RHSA-2026:57194

Fixed in:engine/hive-rhel9@sha256:485d099ebe627cc72f7e78b2e9069d5da6e3ad3ce27c608afb1469de724f1f30_arm64RHSA-2026:59559

Fixed in:engine/registration-rhel9@sha256:883ec8c53e075cb00e643a732266141e3ef2b3526e2d7056dd531b9163822196_amd64RHSA-2026:59559

Fixed in:engine/discovery-rhel9@sha256:2f6e40368bdfae438e53dbfa35792f997c0eb441139c2dd96354cfd30f29802f_arm64RHSA-2026:59559

Fixed in:engine/hive-rhel9@sha256:c46d99c393988beb2e59a50d1b3d359fc7c90e5e5b4618e04fe44a10a6a17d51_s390xRHSA-2026:57194

Fixed in:engine/registration-rhel9@sha256:d7773c9a6aabe9341d11647f496605681c51f75d4d51880592e4d1cf71c6f12c_ppc64leRHSA-2026:59559

Fixed in:engine/hive-rhel9@sha256:8884f30adfed58178637ccb133c0b3f73f0fd7813c8af86e362245a5f5ab0ecd_arm64RHSA-2026:57194

registry.redhat.io/multiclusterRocky

Fixed in:engine/registration-rhel9@sha256:d7773c9a6aabe9341d11647f496605681c51f75d4d51880592e4d1cf71c6f12c_ppc64leRHSA-2026:59559

Fixed in:engine/registration-rhel9@sha256:55c7ed6f934c9d0ed61e529cada40c3b2565cca593d55d93ac3d89e0655c92e9_arm64RHSA-2026:57194

Fixed in:engine/work-rhel9@sha256:5005b9be66591a6cfa64106e0c664a580832dc77eab2d19b918e3d53a4898310_amd64RHSA-2026:59559

Fixed in:engine/discovery-rhel9@sha256:43850784416ed4c8ff8c41eb71382a4a4afb7804d57da0a151e9d90a30fc17e2_arm64RHSA-2026:57194

Fixed in:engine/hive-rhel9@sha256:9a0a343656e1cccae323daff2f50ad562742452907b681c64d52ff92421a78a6_amd64RHSA-2026:59558

Fixed in:engine/discovery-rhel9@sha256:50aeb7d7d86608268669f87ab9fd6345139b3ba08d23e3a28925da887ec49ee6_s390xRHSA-2026:59558

Fixed in:engine/placement-rhel9@sha256:4c093140aba0aea2d3a2cd4928991016ee6c3fa60772a2059af7bd4a38ae2b3c_ppc64leRHSA-2026:59559

Fixed in:engine/placement-rhel9@sha256:b7d2390f5af76fbc2c7c4506ba56086c996e34aa05018ffc16c8b68413c510f6_amd64RHSA-2026:59579

registry.redhat.io/multicluster-engine/addonRed Hat / RHEL

Fixed in:manager-rhel9@sha256:cc7013d30b2b83c31af89ce47b4c4efe09ec261d6d7ff12ee771edd76178eb40_arm64RHSA-2026:59559

Fixed in:manager-rhel9@sha256:478425331df9f329a5ecdeab3c308720a5332b442524863509c56e9114ec04cc_s390xRHSA-2026:59579

Fixed in:manager-rhel9@sha256:0d668fb3c0766c121dcb2fe1c50b0e650f3e5619212cfd6c5b8606cbf2f46ed5_ppc64leRHSA-2026:59579

Fixed in:manager-rhel9@sha256:45985b45748ae291d47aa64078fffc8dab0e8bfda806b9939625ad774e6b3ef4_amd64RHSA-2026:59559

Fixed in:manager-rhel9@sha256:0451628c58cb6738977a1a5499f204b07e8ab02b41e949b27b263fea3ea61f88_amd64RHSA-2026:57194

Fixed in:manager-rhel9@sha256:3e9e3ef83f3da8d29471e8cc5cc0315f7b02dd44cfaafbd0b27f049d2efcc4a5_ppc64leRHSA-2026:57194

Fixed in:manager-rhel9@sha256:ba8e2a155495f12baa4a3a908c125307168f9b4ce3cf50dec6ec7d6f5b78dfea_ppc64leRHSA-2026:59558

Fixed in:manager-rhel9@sha256:39107a76cb734e1ac067b0e92edfa3b3ee815eceb88679d4694ac8ddbc132996_amd64RHSA-2026:59558

registry.redhat.io/multicluster-engine/addonRocky

Fixed in:manager-rhel9@sha256:0d668fb3c0766c121dcb2fe1c50b0e650f3e5619212cfd6c5b8606cbf2f46ed5_ppc64leRHSA-2026:59579

Fixed in:manager-rhel9@sha256:d1d588dada5b4df6834112599ded1d58803440dbb469bcef41f45edc588eeab5_s390xRHSA-2026:59558

Fixed in:manager-rhel9@sha256:f4a5ebfd1ccd9330f8dd9fe29716934c87ac252f978be0579aa897ff07db23ca_arm64RHSA-2026:59558

Fixed in:manager-rhel9@sha256:cc7013d30b2b83c31af89ce47b4c4efe09ec261d6d7ff12ee771edd76178eb40_arm64RHSA-2026:59559

Fixed in:manager-rhel9@sha256:5acf929f44e14e1a1d229e0a4d0e0d68c592654435d0a7ea234c23d88e7da686_s390xRHSA-2026:57194

Fixed in:manager-rhel9@sha256:39107a76cb734e1ac067b0e92edfa3b3ee815eceb88679d4694ac8ddbc132996_amd64RHSA-2026:59558

Fixed in:manager-rhel9@sha256:0451628c58cb6738977a1a5499f204b07e8ab02b41e949b27b263fea3ea61f88_amd64RHSA-2026:57194

Fixed in:manager-rhel9@sha256:ba8e2a155495f12baa4a3a908c125307168f9b4ce3cf50dec6ec7d6f5b78dfea_ppc64leRHSA-2026:59558

registry.redhat.io/multicluster-engine/azure-serviceRed Hat / RHEL

Fixed in:operator-rhel9@sha256:49774c069cd6a4f2b3850039ae338fa0ff1da3f29a42990a863b6c93dfa30a42_ppc64leRHSA-2026:57194

Fixed in:operator-rhel9@sha256:0f5af66d650b218e30c57aad3bd4d6c9d978a5fee42f5a8e4c3d6b792282cd9b_arm64RHSA-2026:57194

Fixed in:operator-rhel9@sha256:de79fc015730adf4dce460ea07cdabc89b31537a36831bd85a3ed3cc0683307c_s390xRHSA-2026:57194

Fixed in:operator-rhel9@sha256:f480a9edc21d0cf6d2358a6847796ad8438bdb05151c1a263cbd61373b18908d_amd64RHSA-2026:57194

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 RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploit Intelligence

0.22%probability of exploitation in 30 days

13thpercentile

Low risk: more likely to be exploited than 13% of all known CVEs.

References

Vendor Advisory1

pkg.go.dev

Issue Tracking2

Mailing List1

groups.google.com

Related Vulnerabilities

Other CWE-1021 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-21132	Critical	9.6	23%	-	Fix
CVE-2011-1244	Medium	5.8	15%	-	-
CVE-2013-2682	Medium	4.3	6.3%	-	-
CVE-2021-21139	Medium	6.5	4.7%	-	Fix
CVE-2017-11290	Medium	6.1	3.0%	-	-
CVE-2008-2716	Medium	5.0	3.0%	-	Fix

Common questions

How do I fix CVE-2026-42502?

Published advisories record a fix for 207 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-2026-42502 being actively exploited?

Not that we know of. CVE-2026-42502 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.22% is the estimated probability that it will be exploited in the next 30 days. That is higher than 13% of all scored CVEs.

How severe is CVE-2026-42502?

CVE-2026-42502 has a CVSS v3 base score of 6.1, rated moderate. 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-2026-42502 affect?

Published advisories record a fix for golang-golang-x-net (Debian), osbuild-composer (Rocky), osbuild-composer (Red Hat / RHEL), osbuild-composer-core (Rocky), and 203 more. The list on this page is capped, so there may be more.

Embed a live status badge for CVE-2026-42502

Markdown

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HTML

<a href="https://tridentstack.com/cve/CVE-2026-42502"><img src="https://tridentstack.com/cve/badge/CVE-2026-42502.svg" alt="CVE-2026-42502"></a>

Find and fix vulnerabilities across your fleet

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See how it works Start freeThis CVE lookup is free and always will be.

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 2026-07-23.