🛡️ CVE-2026-6879 on Ubuntu — pypy3

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Element.findall() and fully-consumed Element.iterfind() exhibit O(n^2) time complexity when using XPath index predicates (e.g. [1], [last()], [last()-N]) on XML documents with many same-tag siblings. Element.find() is only affected when the first match is near the end  of the sibling list, such as with [last()] or [last()-N];  .//item[1] short-circuits after the first match.

Distribution advisory

This page covers CVE-2026-6879 as tracked by Ubuntu, for the package pypy3. No fixed version has been recorded for this distribution yet.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs administrative privileges on the target. A user must be tricked into taking some action. Rated impact: confidentiality none, integrity none, availability low.

Affected software

UBUNTU-CVE-2026-6879 is recorded against 12 packages.

  • pypy3
  • python2.7
  • python3.10
  • python3.11
  • python3.12
  • python3.14
  • python3.4
  • python3.5
  • python3.6
  • python3.7
  • python3.8
  • python3.9

Timeline and source

Published on 28 July 2026 and last revised on 6 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
www.cve.org (Report)
mail.python.org (Report)
github.com (Report)
github.com (Report)
github.com (Report)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-07-28
Updated 2026-08-11
Modified 2026-08-06
Fix URL N/A

Affected Packages

Software From version Fixed in
pypy3 — —
python2.7 — —
python3.10 — —
python3.11 — —
python3.12 — —
python3.14 — —
python3.4 — —
python3.5 — —
python3.6 — —
python3.7 — —
python3.8 — —
python3.9 — —

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