CVE-2026-3276

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.49% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 39.6% of scored records. A rank, not a probability.

NVD base score

6.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-08-13.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-06-03 14:29Z3 MO AGO

Last updated

2026-08-13 00:28Z22 DAYS AGO

Reserved

2026-02-26

Assigning CNA

PSF

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Weaknesses

• CWE-407Inefficient Algorithmic ComplexityClass
• CWE-606Unchecked Input for Loop ConditionBase

Data version

5.2

Document digest

3b9b0332c2cf2a7bc90f90c6ac1bd1ea943891366f19ee6cd18b31426c547447

• mail.python.orghttps://mail.python.org/archives/list/security-announce@python.org/thread/PP5HB4K7727OBBM76KA2ILID76K3OZGZ/vendor-advisory
• github.comhttps://github.com/python/cpython/pull/149080patch
• github.comhttps://github.com/python/cpython/issues/149079issue-tracking
• github.comhttps://github.com/python/cpython/commit/6b505d1f41f8f3ea0fe5a4786d3a8fff1875cfc0patch
• github.comhttps://github.com/python/cpython/commit/991224b1e8311c85f198f6dd8208bf8cff7fc26fpatch
• github.comhttps://github.com/python/cpython/commit/ba785b88add96acbf403d65cb157fb2743a33a32patch
• github.comhttps://github.com/python/cpython/commit/c5512bd7c1dc28055660565275012766941d3066patch
• github.comhttps://github.com/python/cpython/commit/90748760d38ca3ac5fc6788a69becab905c95598patch
• github.comhttps://github.com/python/cpython/commit/d3ab945af25b28dfe13ac6cb40c124a01b33ce1fpatch
• github.comhttps://github.com/python/cpython/commit/db744c0776c1d5dd11aaa70eff2a6993c408baccpatch
• github.comhttps://github.com/python/cpython/commit/e322a1857084d521f79f45181b776f62e6acfc2cpatch
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/06/03/15