2.1

CVE-2026-15310: python software foundation cpython Uncontrolled Resource Consumption

CVSS: 2.1v4.0LowAwaiting analysis
AliasesALPINE-CVE-2026-15310UBUNTU-CVE-2026-15310DEBIAN-CVE-2026-15310
Published 25-08-2026Last modified 02-10-2026
Open JSON

Vulnerability summary

CVE-2026-15310 is a low (CVSS 2.1) Uncontrolled Resource Consumption vulnerability in python software foundation cpython. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 43.4% of scored vulnerabilities.

Overall risk
9/100
0100
Minimal · default modelHow is this calculated?
CVSS score
2.1/10
010
Low · v4.0 (CVE.org)
EPSS score
0.53%
0%100%
Low · +0.13 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 16 · Related 11
OPENSUSE-SU-2026:11748-1OPENSUSE-SU-2026:11868-1OPENSUSE-SU-2026:11886-1OPENSUSE-SU-2026:11949-1OPENSUSE-SU-2026:11975-1RHSA-2026:65505

Timeline

  1. 25-08-2026
    PublishedVulnerability first disclosed.
  2. 02-10-2026
    Last modifiedVulnerability information updated.

Description

When decompressing crafted zip files using the bzip/LZMA/Zstandard compressions, Python could use an attacker-controlled size to pre-allocate memory, possibly resulting in memory exhaustion.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.53%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

+0.13 pp

From 0.40% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.53%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu11 products
  • python2.7All versions (No fix recorded)
  • python3.10All versions (No fix recorded)
  • python3.11All versions (No fix recorded)
  • python3.12All versions (No fix recorded)
  • python3.14All versions (No fix recorded)
Chainguard5 products
  • python-3.10< 3.10.22-r1
  • python-3.11< 3.11.17-r1
  • python-3.12< 3.12.15-r0
  • python-3.13< 3.13.16_git20261002-r0
  • python-3.14< 3.14.7_git20260912-r0
Wolfi5 products
  • python-3.10< 3.10.22-r1
  • python-3.11< 3.11.17-r1
  • python-3.12< 3.12.15-r0
  • python-3.13< 3.13.16_git20261002-r0
  • python-3.14< 3.14.7_git20260912-r0
Debian4 products
  • python3.11< 3.11.2-6+deb12u9
  • python3.13All versions (No fix recorded)
  • python3.14< 3.14.7-3
  • python3.15< 3.15.0~rc2-1
Alpine1 product
  • python3< 3.12.15-r0 | < 3.14.8-r0
Opensuse1 product
  • python313&distro=openSUSE Tumbleweed< 3.13.15-2.1
Python software foundation1 product
  • cpython< 3.10.22 | ≥ 3.11.0, < 3.11.17 | ≥ 3.12.0, < 3.12.15 | ≥ 3.13.0, < 3.13.16 | ≥ 3.14.0, < 3.14.8 | ≥ 3.15.0a1, < 3.15.0rc2

7 vendors · 28 products

References

21 links
Show all 21 references