CVE & CISA-KEV Catalog

CVE-2023-27043

MEDIUMEPSS 84th pctl
5.3
CVSS v3
NVD

Description

The email module of Python through 3.11.3 incorrectly parses e-mail addresses that contain a special character. The wrong portion of an RFC2822 header is identified as the value of the addr-spec. In some applications, an attacker can bypass a protection mechanism in which application access is granted only after verifying receipt of e-mail to a specific domain (e.g., only @company.example.com addresses may be used for signup). This occurs in email/_parseaddr.py in recent versions of Python.

CWE-20Improper Input ValidationCWE-1286

How to fix

Remediation Available
pypy3Debian
Fixed in:7.3.5+dfsg-2+deb11u4CVE-2023-27043
Fixed in:7.3.11+dfsg-2+deb12u3CVE-2023-27043
Fixed in:7.3.17+dfsg-3CVE-2023-27043
Fixed in:7.3.17+dfsg-3CVE-2023-27043
Cython-0:0.29.21Red Hat / RHEL
Fixed in:5.module+el8.9.0+19644+d68f775d.src::python39-devel:3.9RHSA-2024:2985
Cython-0:0.29.21Rocky
Fixed in:5.module+el8.9.0+19644+d68f775d.src::python39-devel:3.9RHSA-2024:2985
Cython-debugsource-0:0.29.21Red Hat / RHEL
Fixed in:5.module+el8.9.0+19644+d68f775d.aarch64::python39-devel:3.9RHSA-2024:2985
Fixed in:5.module+el8.9.0+19644+d68f775d.ppc64le::python39-devel:3.9RHSA-2024:2985
Fixed in:5.module+el8.9.0+19644+d68f775d.s390x::python39-devel:3.9RHSA-2024:2985
Fixed in:5.module+el8.9.0+19644+d68f775d.x86_64::python39-devel:3.9RHSA-2024:2985
Cython-debugsource-0:0.29.21Rocky
Fixed in:5.module+el8.9.0+19644+d68f775d.x86_64::python39-devel:3.9RHSA-2024:2985
Fixed in:5.module+el8.9.0+19644+d68f775d.s390x::python39-devel:3.9RHSA-2024:2985
Fixed in:5.module+el8.9.0+19644+d68f775d.ppc64le::python39-devel:3.9RHSA-2024:2985
Fixed in:5.module+el8.9.0+19644+d68f775d.aarch64::python39-devel:3.9RHSA-2024:2985
PyYAMLRed Hat / RHEL
Fixed in:0:5.4.1-1.module+el8.9.0+19644+d68f775d.src::python39:3.9RHSA-2024:2985
PyYAMLRocky
Fixed in:0:5.4.1-1.module+el8.9.0+19644+d68f775d.src::python39:3.9RHSA-2024:2985
PyYAML-debugsourceRocky
Fixed in:0:5.4.1-1.module+el8.9.0+19644+d68f775d.x86_64::python39:3.9RHSA-2024:2985
Fixed in:0:5.4.1-1.module+el8.9.0+19644+d68f775d.aarch64::python39:3.9RHSA-2024:2985
Fixed in:0:5.4.1-1.module+el8.9.0+19644+d68f775d.ppc64le::python39:3.9RHSA-2024:2985
Fixed in:0:5.4.1-1.module+el8.9.0+19644+d68f775d.s390x::python39:3.9RHSA-2024:2985
PyYAML-debugsourceRed Hat / RHEL
Fixed in:0:5.4.1-1.module+el8.9.0+19644+d68f775d.ppc64le::python39:3.9RHSA-2024:2985
Fixed in:0:5.4.1-1.module+el8.9.0+19644+d68f775d.x86_64::python39:3.9RHSA-2024:2985
Fixed in:0:5.4.1-1.module+el8.9.0+19644+d68f775d.aarch64::python39:3.9RHSA-2024:2985
Fixed in:0:5.4.1-1.module+el8.9.0+19644+d68f775d.s390x::python39:3.9RHSA-2024:2985
mod_wsgiRocky
Fixed in:0:4.7.1-7.module+el8.9.0+19644+d68f775d.src::python39:3.9RHSA-2024:2985
mod_wsgiRed Hat / RHEL
Fixed in:0:4.7.1-7.module+el8.9.0+19644+d68f775d.src::python39:3.9RHSA-2024:2985
numpyRocky
Fixed in:0:1.19.4-3.module+el8.9.0+19644+d68f775d.src::python39:3.9RHSA-2024:2985
numpyRed Hat / RHEL
Fixed in:0:1.19.4-3.module+el8.9.0+19644+d68f775d.src::python39:3.9RHSA-2024:2985
numpy-debugsourceRed Hat / RHEL
Fixed in:0:1.19.4-3.module+el8.9.0+19644+d68f775d.x86_64::python39:3.9RHSA-2024:2985
Fixed in:0:1.19.4-3.module+el8.9.0+19644+d68f775d.ppc64le::python39:3.9RHSA-2024:2985
Fixed in:0:1.19.4-3.module+el8.9.0+19644+d68f775d.s390x::python39:3.9RHSA-2024:2985
Fixed in:0:1.19.4-3.module+el8.9.0+19644+d68f775d.aarch64::python39:3.9RHSA-2024:2985
numpy-debugsourceRocky
Fixed in:0:1.19.4-3.module+el8.9.0+19644+d68f775d.aarch64::python39:3.9RHSA-2024:2985
Fixed in:0:1.19.4-3.module+el8.9.0+19644+d68f775d.ppc64le::python39:3.9RHSA-2024:2985
Fixed in:0:1.19.4-3.module+el8.9.0+19644+d68f775d.s390x::python39:3.9RHSA-2024:2985
Fixed in:0:1.19.4-3.module+el8.9.0+19644+d68f775d.x86_64::python39:3.9RHSA-2024:2985
odf4/cephcsiRed Hat / RHEL
Fixed in:rhel9@sha256:765e623f5b4de11f0482f3abde344df4946665046c9190293a0ae9a5d0d62cd2_s390xRHSA-2024:1383
Fixed in:rhel9@sha256:b4b66a42eb728b46ff977431fd07be976d465680f49516dac3f433cdd12e4dbc_ppc64leRHSA-2024:1383
Fixed in:rhel9@sha256:5e262fe96badcdebcf0fc40e07acecd607b83a3d48fb90b05bc89ebe790add14_amd64RHSA-2024:1383
odf4/cephcsiRocky
Fixed in:rhel9@sha256:b4b66a42eb728b46ff977431fd07be976d465680f49516dac3f433cdd12e4dbc_ppc64leRHSA-2024:1383
Fixed in:rhel9@sha256:5e262fe96badcdebcf0fc40e07acecd607b83a3d48fb90b05bc89ebe790add14_amd64RHSA-2024:1383
Fixed in:rhel9@sha256:765e623f5b4de11f0482f3abde344df4946665046c9190293a0ae9a5d0d62cd2_s390xRHSA-2024:1383
odf4/mcgRed Hat / RHEL
Fixed in:rhel9-operator@sha256:d04a5a9748ac34459c21d4d10efcc9318220c7ceeeb15c41c56cae9bfbb44872_arm64RHSA-2024:1383
Fixed in:core-rhel9@sha256:23becbe8a9d70cda09e2d10fdd3411b943368a3d92535798d595d29b5bbc4f7e_arm64RHSA-2024:1383
Fixed in:rhel9-operator@sha256:94f6dded2ff421275b26d147e35d33e383f06ecb04cd0a618d8b4c5046d0e307_ppc64leRHSA-2024:1383
Fixed in:operator-bundle@sha256:98fb1b9309d82c663d3118d19fe776de51a277c474a42bf249fdf075f6993bc4_ppc64leRHSA-2024:1383
Fixed in:core-rhel9@sha256:b0eece2979587d7884f8707a6026e28a4aa7a3d96646b01249a9e351acf6b935_ppc64leRHSA-2024:1383
Fixed in:rhel9-operator@sha256:93ed7e87e7660991843f3b2114ff2abe74f3b509c2b9a0ee32fc8707051203af_amd64RHSA-2024:1383
Fixed in:operator-bundle@sha256:19c29de2cf31f95e5f363064095602656355879eb19c778a8655083cebd54ce6_amd64RHSA-2024:1383
Fixed in:core-rhel9@sha256:f98634a0fa2517efb383bf6c2a4809f150408225875d7425e64a339209d72e32_amd64RHSA-2024:1383
odf4/mcgRocky
Fixed in:rhel9-operator@sha256:d312e5adf2261eeab1106a72565652637d42e2d49d2294cb1413be62697f18d2_s390xRHSA-2024:1383
Fixed in:core-rhel9@sha256:23becbe8a9d70cda09e2d10fdd3411b943368a3d92535798d595d29b5bbc4f7e_arm64RHSA-2024:1383
Fixed in:rhel9-operator@sha256:d04a5a9748ac34459c21d4d10efcc9318220c7ceeeb15c41c56cae9bfbb44872_arm64RHSA-2024:1383
Fixed in:core-rhel9@sha256:f98634a0fa2517efb383bf6c2a4809f150408225875d7425e64a339209d72e32_amd64RHSA-2024:1383
Fixed in:operator-bundle@sha256:19c29de2cf31f95e5f363064095602656355879eb19c778a8655083cebd54ce6_amd64RHSA-2024:1383
Fixed in:rhel9-operator@sha256:93ed7e87e7660991843f3b2114ff2abe74f3b509c2b9a0ee32fc8707051203af_amd64RHSA-2024:1383
Fixed in:core-rhel9@sha256:b0eece2979587d7884f8707a6026e28a4aa7a3d96646b01249a9e351acf6b935_ppc64leRHSA-2024:1383
Fixed in:operator-bundle@sha256:98fb1b9309d82c663d3118d19fe776de51a277c474a42bf249fdf075f6993bc4_ppc64leRHSA-2024:1383
odf4/ocsRocky
Fixed in:rhel9-operator@sha256:4ce02a91070158e2b0e199d6949b66daa9ecdb716dddcbc586c368cd5180dd16_s390xRHSA-2024:1383
Fixed in:operator-bundle@sha256:e63f59d7d4aeff45ffe3e5d622b0526f568f39b559f21fa87f08a69e1a8452ac_s390xRHSA-2024:1383
Fixed in:operator-bundle@sha256:72c56580bab623f3e19418c52a6cc2e062c1f799e30609a4d4e292f525d01ec2_amd64RHSA-2024:1383
Fixed in:rhel9-operator@sha256:b94cc2b0df9566a19418cd9445018c7974bdeb501b9bc26d374f8ecc400ff725_amd64RHSA-2024:1383
Fixed in:operator-bundle@sha256:001f41ba066f39fc00818ec9982d5408415cc41cfa0c35e17a81310994e976a6_ppc64leRHSA-2024:1383
Fixed in:rhel9-operator@sha256:2ee595d52185127dbcef534dee457e9bdb2e72c7292fdafaec8f730e00762ef9_ppc64leRHSA-2024:1383
Fixed in:rhel9-operator@sha256:f0eed493b993b35b41819c28e10218d5e3cae8da5a4fc6050a845c24b440b198_arm64RHSA-2024:1383
odf4/ocsRed Hat / RHEL
Fixed in:operator-bundle@sha256:e63f59d7d4aeff45ffe3e5d622b0526f568f39b559f21fa87f08a69e1a8452ac_s390xRHSA-2024:1383
Fixed in:rhel9-operator@sha256:4ce02a91070158e2b0e199d6949b66daa9ecdb716dddcbc586c368cd5180dd16_s390xRHSA-2024:1383
Fixed in:operator-bundle@sha256:72c56580bab623f3e19418c52a6cc2e062c1f799e30609a4d4e292f525d01ec2_amd64RHSA-2024:1383
Fixed in:rhel9-operator@sha256:b94cc2b0df9566a19418cd9445018c7974bdeb501b9bc26d374f8ecc400ff725_amd64RHSA-2024:1383
Fixed in:operator-bundle@sha256:001f41ba066f39fc00818ec9982d5408415cc41cfa0c35e17a81310994e976a6_ppc64leRHSA-2024:1383
Fixed in:rhel9-operator@sha256:2ee595d52185127dbcef534dee457e9bdb2e72c7292fdafaec8f730e00762ef9_ppc64leRHSA-2024:1383
Fixed in:rhel9-operator@sha256:f0eed493b993b35b41819c28e10218d5e3cae8da5a4fc6050a845c24b440b198_arm64RHSA-2024:1383
odf4/ocs-clientRocky
Fixed in:console-rhel9@sha256:f1b19a6b805ad0ae2bc7dc08f2e7992e9d440bfa858d5ac2667f9311a95d6e12_s390xRHSA-2024:1383
Fixed in:rhel9-operator@sha256:e40c768e57bc8fc19a4028d8474cc00529b05fea3e1fdc7bd793c0b49df4891b_amd64RHSA-2024:1383
Fixed in:rhel9-operator@sha256:54d229a2b193748da1f66de6ce0c405f591808dd35e26dd0304582d86ba4d708_arm64RHSA-2024:1383
Fixed in:rhel9-operator@sha256:d027156f3a8a80a12cfe6bdf207a25a3b1e0e84db9a59853072fdc6ea3766e18_s390xRHSA-2024:1383
Fixed in:operator-bundle@sha256:7fdae4274b87123284a7fb6cc7b56be3e22be629ff834d658a9afd867ef6473b_s390xRHSA-2024:1383
Fixed in:console-rhel9@sha256:1add011155a8f31010d52ab3a441a332272ca8bc0bbe93f21d126ed99b07218a_amd64RHSA-2024:1383
Fixed in:operator-bundle@sha256:85b41f9c66184ccc262cb8e00d3fdeb9029ca5c39df5521afb44bac604039bbe_amd64RHSA-2024:1383
Fixed in:console-rhel9@sha256:abe77b4860b2c3d88b081aa0bb69c996cb83bc288209aa805de626220cc0ad48_ppc64leRHSA-2024:1383
odf4/ocs-clientRed Hat / RHEL
Fixed in:rhel9-operator@sha256:d027156f3a8a80a12cfe6bdf207a25a3b1e0e84db9a59853072fdc6ea3766e18_s390xRHSA-2024:1383
Fixed in:operator-bundle@sha256:7fdae4274b87123284a7fb6cc7b56be3e22be629ff834d658a9afd867ef6473b_s390xRHSA-2024:1383
Fixed in:console-rhel9@sha256:f1b19a6b805ad0ae2bc7dc08f2e7992e9d440bfa858d5ac2667f9311a95d6e12_s390xRHSA-2024:1383
Fixed in:console-rhel9@sha256:abe77b4860b2c3d88b081aa0bb69c996cb83bc288209aa805de626220cc0ad48_ppc64leRHSA-2024:1383
Fixed in:operator-bundle@sha256:b081d99f0507897a3217db22bca57a948bbefdf27e30fd0506275b1dd908c7f6_ppc64leRHSA-2024:1383
Fixed in:rhel9-operator@sha256:e40c768e57bc8fc19a4028d8474cc00529b05fea3e1fdc7bd793c0b49df4891b_amd64RHSA-2024:1383
Fixed in:operator-bundle@sha256:85b41f9c66184ccc262cb8e00d3fdeb9029ca5c39df5521afb44bac604039bbe_amd64RHSA-2024:1383
Fixed in:console-rhel9@sha256:1add011155a8f31010d52ab3a441a332272ca8bc0bbe93f21d126ed99b07218a_amd64RHSA-2024:1383
odf4/ocs-metricsRed Hat / RHEL
Fixed in:exporter-rhel9@sha256:f437b8176480efc681950d885ce5a2816e3bc1a8bcb98b8d02fef7c201134c21_amd64RHSA-2024:1383
Fixed in:exporter-rhel9@sha256:c89d0ad159bff3915c121a3b97a3dc207d69cab48a25c73e27b53f2aacc6ebf7_ppc64leRHSA-2024:1383
Fixed in:exporter-rhel9@sha256:378212f323bd7dcc080f31b2f75082ec28c3d6104240c6eb2763d6bd2fc94d8e_s390xRHSA-2024:1383
odf4/ocs-metricsRocky
Fixed in:exporter-rhel9@sha256:378212f323bd7dcc080f31b2f75082ec28c3d6104240c6eb2763d6bd2fc94d8e_s390xRHSA-2024:1383
Fixed in:exporter-rhel9@sha256:c89d0ad159bff3915c121a3b97a3dc207d69cab48a25c73e27b53f2aacc6ebf7_ppc64leRHSA-2024:1383
Fixed in:exporter-rhel9@sha256:f437b8176480efc681950d885ce5a2816e3bc1a8bcb98b8d02fef7c201134c21_amd64RHSA-2024:1383
odf4/odfRed Hat / RHEL
Fixed in:console-rhel9@sha256:9e12f5478515f1641afb3a4dde983671270afeed59a6372a30c74b3b7a5936a3_ppc64leRHSA-2024:1383
Fixed in:rhel9-operator@sha256:418e629e0aaf849c95257c6bcf23b3d51e87c5de7c008e7f53cd3acaa1295461_arm64RHSA-2024:1383
Fixed in:console-rhel9@sha256:9a90552dd4d8921f3ef1f2a090140ec0d2de3ee41d1b7a6d9963104689618153_amd64RHSA-2024:1383
Fixed in:cli-rhel9@sha256:bb23cf0882f1174a311a05c59646cb1cf30d4a74a297c854c19a26152d47ab47_s390xRHSA-2024:1383
Fixed in:console-rhel9@sha256:7dcf6b7101b8ebc902b7582dc2038f261b0d7f4783f0ac6ac8d97c60126801b2_s390xRHSA-2024:1383
Fixed in:rhel9-operator@sha256:4044d62c852f88417de640f4d1c0fdf9e37d9b1c61de54ea379d321d9e04d05d_ppc64leRHSA-2024:1383
Fixed in:operator-bundle@sha256:2df80b908fc7dfd07dae58d641d9ab412f345114bed59cdd59e7c2b9f274b1a3_ppc64leRHSA-2024:1383
Fixed in:cli-rhel9@sha256:8bcf56bad8bfa401441828b8f2c77a88697f83103360f76f534abaabc7b4ed1f_ppc64leRHSA-2024:1383
odf4/odfRocky
Fixed in:rhel9-operator@sha256:418e629e0aaf849c95257c6bcf23b3d51e87c5de7c008e7f53cd3acaa1295461_arm64RHSA-2024:1383
Fixed in:cli-rhel9@sha256:bb23cf0882f1174a311a05c59646cb1cf30d4a74a297c854c19a26152d47ab47_s390xRHSA-2024:1383
Fixed in:operator-bundle@sha256:2df80b908fc7dfd07dae58d641d9ab412f345114bed59cdd59e7c2b9f274b1a3_ppc64leRHSA-2024:1383
Fixed in:console-rhel9@sha256:9e12f5478515f1641afb3a4dde983671270afeed59a6372a30c74b3b7a5936a3_ppc64leRHSA-2024:1383
Fixed in:cli-rhel9@sha256:8bcf56bad8bfa401441828b8f2c77a88697f83103360f76f534abaabc7b4ed1f_ppc64leRHSA-2024:1383
Fixed in:rhel9-operator@sha256:4044d62c852f88417de640f4d1c0fdf9e37d9b1c61de54ea379d321d9e04d05d_ppc64leRHSA-2024:1383
Fixed in:rhel9-operator@sha256:3776c9d3070eef0f138f92c1d795c5070fd36da9f253d5c40b06f2eda733415b_s390xRHSA-2024:1383
Fixed in:operator-bundle@sha256:5254d6581a1e5c7bbdf2621448d812be6ae5a1931009a3f9aa1046176841f68b_s390xRHSA-2024:1383
odf4/odf-cosiRocky
Fixed in:sidecar-rhel9@sha256:dbf68ee98865ddf8ace7a8f626c7c588f35724bc565ce10ffe23d4c76bf2c7e5_ppc64leRHSA-2024:1383
Fixed in:sidecar-rhel9@sha256:d984ee4c271840b18c3b2624e24db18a7be822950d00eab744a7ccd88998c539_amd64RHSA-2024:1383
Fixed in:sidecar-rhel9@sha256:c7c5f4cbee26d0ef67fcf9294d3773e2e37308ae56da865cc0ad356ed8f5e206_s390xRHSA-2024:1383
odf4/odf-cosiRed Hat / RHEL
Fixed in:sidecar-rhel9@sha256:dbf68ee98865ddf8ace7a8f626c7c588f35724bc565ce10ffe23d4c76bf2c7e5_ppc64leRHSA-2024:1383
Fixed in:sidecar-rhel9@sha256:d984ee4c271840b18c3b2624e24db18a7be822950d00eab744a7ccd88998c539_amd64RHSA-2024:1383
Fixed in:sidecar-rhel9@sha256:c7c5f4cbee26d0ef67fcf9294d3773e2e37308ae56da865cc0ad356ed8f5e206_s390xRHSA-2024:1383
odf4/odf-csi-addonsRocky
Fixed in:rhel9-operator@sha256:32f3f0dbf489a6db8f56235780e2dd119c6295b8fa4d5216418daa17203e38c8_arm64RHSA-2024:1383
Fixed in:sidecar-rhel9@sha256:7c900a434cff47dae8662ff00e64542b591eb388e5aecdc9fe3746542f278f9c_arm64RHSA-2024:1383
Fixed in:operator-bundle@sha256:cc9a1591a6dde4b82a87915589458a5741566e29cc80e16f2d96bd5bafc85bbe_s390xRHSA-2024:1383
Fixed in:rhel9-operator@sha256:fe0cbb229b959a9fe2f47c08fbe6239a275bd30e6dc00e81e6f5f97ef8211a38_s390xRHSA-2024:1383
Fixed in:sidecar-rhel9@sha256:2e339236492b5bf2e881b8e88c40f54b4b0b9dddbe442363b2efb92dfd720d29_s390xRHSA-2024:1383
Fixed in:sidecar-rhel9@sha256:ca132fd7b3c36d14ba87259812a92f219bc4cceb12ba30a119062b95f86963e9_ppc64leRHSA-2024:1383
Fixed in:rhel9-operator@sha256:3efe898c6142154200e47f4615acf03b0ce6c30ead6470307a782a9a2578cf53_ppc64leRHSA-2024:1383
Fixed in:operator-bundle@sha256:3738a473f48376f6debe80dfed9d4decbfffd0a4ea04f59a9d20b7b6b7039830_ppc64leRHSA-2024:1383

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 InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityLow
AvailabilityNone

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

Exploit Intelligence

2.53%probability of exploitation in 30 days
84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Exploit1
Third-Party Advisory38

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Common questions

How do I fix CVE-2023-27043?

Published advisories record a fix for 302 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-2023-27043 being actively exploited?

Not that we know of. CVE-2023-27043 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.5% is the estimated probability that it will be exploited in the next 30 days. That is higher than 84% of all scored CVEs.

How severe is CVE-2023-27043?

CVE-2023-27043 has a CVSS v3 base score of 5.3, 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-2023-27043 affect?

Published advisories record a fix for pypy3 (Debian), Cython-0:0.29.21 (Red Hat / RHEL), Cython-0:0.29.21 (Rocky), Cython-debugsource-0:0.29.21 (Red Hat / RHEL), and 298 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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Markdown

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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 2026-05-12.