CVE-2025-12781

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

0.85% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 58.2% 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:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/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

Analyzed. NVD last modified this record on 2026-06-17.

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

2026-01-21 19:34Z9 MO AGO

Last updated

2026-01-22 20:12Z9 MO AGO

Reserved

2025-11-05

Assigning CNA

PSF

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

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

Weaknesses

• CWE-704Incorrect Type Conversion or CastClass
• CWE-20Improper Input ValidationClass

Data version

5.2

Document digest

c63ad33425d1db0eee91c21320946da43c096981a1cbd9cab4941f0f10b2c9d2

• github.comhttps://github.com/python/cpython/pull/141128patch
• github.comhttps://github.com/python/cpython/issues/125346issue-tracking
• mail.python.orghttps://mail.python.org/archives/list/security-announce@python.org/thread/KRI7GC6S27YV5NJ4FPDALS2WI5ENAFJ6/vendor-advisory
• github.comhttps://github.com/python/cpython/commit/13360efd385d1a7d0659beba03787ea3d063ef9bpatch
• github.comhttps://github.com/python/cpython/commit/1be80bec7960f5ccd059e75f3dfbd45fca302947patch
• github.comhttps://github.com/python/cpython/commit/9060b4abbe475591b6230b23c2afefeff26fcca5patch
• github.comhttps://github.com/python/cpython/commit/e95e783dff443b68e8179fdb57737025bf02ba76patch
• github.comhttps://github.com/python/cpython/commit/fd17ee026fa9b67f6288cbafe374a3e479fe03a5patch