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3446 articles · 168099 vulns · 36/41 feeds (7d)
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CVE-2026-0864PATCHED
python software foundation · cpython

Configuration Injection via Carriage Return (\r) in write() method

Description

When using the "configparser" module to write configuration files containing multi-line text values with carriage return characters (\r) the resulting file could be injected with unexpected keys and values if the attacker controls the written value.

Affected Products

VendorProductVersions
python software foundationcpython0

Also Affects

Downstream vendors/products affected by this vulnerability

VendorProductSourceConfidence
open sourcepythoncert_advisory90%

References

  • https://github.com/python/cpython/pull/151559(patch)
  • https://mail.python.org/archives/list/security-announce@python.org/thread/CV4NE6AFCRJL7XQOHX7J5TSDHUWVWGJS/(vendor-advisory)
  • https://github.com/python/cpython/issues/143927(issue-tracking)
  • https://github.com/python/cpython/commit/5858e42c539dac8394636a6e9b30472b8994851f(patch)
  • https://github.com/python/cpython/commit/0adb386f6e68eb2e73d32e19f235d012df009528(patch)
  • https://github.com/python/cpython/commit/71f2e02a52d47417a6fd69f456346cd8aa7aca98(patch)
  • https://github.com/python/cpython/commit/aaf850fd333cd89e9aada03d92aaa788a6cb1bb8(patch)

Related News (4 articles)

Tier A
Microsoft MSRC3h ago
CVE-2026-0864 Configuration Injection via Carriage Return (\r) in write() method
→ No new info (linked only)
Tier B
CERT-FR3d ago
Multiples vulnérabilités dans CPython (25 juin 2026)
→ No new info (linked only)
Tier B
BSI Advisories4d ago
[NEU] [hoch] CPython: Mehrere Schwachstellen
→ No new info (linked only)
Tier C
VulDB4d ago
CVE-2026-0864 | Python CPython up to 3.14.x Configuration injection (ID 143927)
→ No new info (linked only)
CISA KEV❌ No
Actively exploited❌ No
Patch available
null
PublishedJun 23, 2026
Last enriched4d agov2
Tags
CVE-2026-0864
Trending Score39
Source articles4
Independent4
Info Completeness8/14
Missing: cvss, epss, kev, exploit, iocs, mitre_attack

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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
Jun 23, 2026
Discovered by ZDM
Jun 23, 2026
Updated: severity, affectedVersions, patchAvailable, tags
Jun 23, 2026
Patch Available
Jun 24, 2026

Version History

v2
Last enriched 4d ago
v2Tier C4d ago

Updated severity to CRITICAL, added affected versions 3.14.x, and corrected exploit availability.

severityaffectedVersionspatchAvailabletags
via VulDB
v14d ago

Initial creation