CVE-2026-87910

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

0.60% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 48.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:H/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

Awaiting Analysis. NVD last modified this record on 2026-10-22.

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

2026-09-11 17:27Z1 MO AGO

Last updated

2026-10-22 00:31Z7 DAYS AGO

Reserved

2026-09-09

Assigning CNA

PSF

Record state

PUBLISHED

Severity

Medium (CVSS 5.7)

CNA CVSS vector

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

Weaknesses

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base
• CWE-59Improper Link Resolution Before File Access ('Link Following')Base
• CWE-252Unchecked Return ValueBase

Data version

5.2

Document digest

f8234c639660f4041c901c5dd1e037e0ada4d19d8cad216fda0226717588de25

• mail.python.orghttps://mail.python.org/archives/list/security-announce@python.org/thread/57TBTLL2W6APMZR3A25B2YV7GL3EPTDJ/vendor-advisory
• github.comhttps://github.com/python/cpython/pull/157266patch
• github.comhttps://github.com/python/cpython/issues/157265issue-tracking
• github.comhttps://github.com/python/cpython/commit/d9565e54b1fc6d63c5be9afd58114499128fa57bpatch
• github.comhttps://github.com/python/cpython/commit/fb2f0bbc3b35264f09cc2cb2934b7987527a6bc2patch
• github.comhttps://github.com/python/cpython/commit/9c17bace90f88dfba6d0e2fe23c8e7ae35f83955patch
• github.comhttps://github.com/python/cpython/commit/764fd0af8d9e19d3684a58d2e58bf770f0605036patch
• github.comhttps://github.com/python/cpython/commit/2eb0c2f1dc71847731b6ab30aebefd058d482a7fpatch
• github.comhttps://github.com/python/cpython/commit/c1f106d240c4ffcb3608ed0a20e8aba6c865f6d3patch
• github.comhttps://github.com/python/cpython/commit/3105a3498aaf681ce128cf5baf83c2e5574267c5patch
• github.comhttps://github.com/python/cpython/commit/a4919937a4e1e69a0d178909c6f20557eca5d1d0patch
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/09/11/8