CVE-2026-0864

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

0.13% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 2.7% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:P/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

Analyzed. NVD last modified this record on 2026-08-18.

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

2026-06-23 17:42Z2 MO AGO

Last updated

2026-08-13 00:29Z23 DAYS AGO

Reserved

2026-01-12

Assigning CNA

PSF

Record state

PUBLISHED

Severity

Medium (CVSS 4.1)

CNA CVSS vector

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

Weaknesses

• CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')Class
• CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')Base

Data version

5.2

Document digest

787ac5179249d9eb8235ef6b93f964cd002a536015368cbfc06c59c4c33a5614

• github.comhttps://github.com/python/cpython/pull/151559patch
• mail.python.orghttps://mail.python.org/archives/list/security-announce@python.org/thread/CV4NE6AFCRJL7XQOHX7J5TSDHUWVWGJS/vendor-advisory
• github.comhttps://github.com/python/cpython/issues/143927issue-tracking
• github.comhttps://github.com/python/cpython/commit/5858e42c539dac8394636a6e9b30472b8994851fpatch
• github.comhttps://github.com/python/cpython/commit/0adb386f6e68eb2e73d32e19f235d012df009528patch
• github.comhttps://github.com/python/cpython/commit/71f2e02a52d47417a6fd69f456346cd8aa7aca98patch
• github.comhttps://github.com/python/cpython/commit/aaf850fd333cd89e9aada03d92aaa788a6cb1bb8patch
• github.comhttps://github.com/python/cpython/commit/db4a157c790479710a1a840d7937c5c815a6f8b6patch
• github.comhttps://github.com/python/cpython/commit/12dcbd74d3563016a8cb8c47e4898889f34f74ddpatch
• github.comhttps://github.com/python/cpython/commit/274de100bbf4345bd0c23ef5b446722e9e636908patch