5.5

CVE-2026-32288: go standard library archive/tar

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-32288DEBIAN-CVE-2026-32288CGA-22hm-j34x-3xfv
Published 08-04-2026Last modified 13-04-2026
Open JSON

Vulnerability summary

CVE-2026-32288 is a medium (CVSS 5.5) vulnerability in go standard library archive/tar. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.4% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.18%
0%100%
Low · -0.11 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 20 · Related 19
MGASA-2026-0143MGASA-2026-0147OPENSUSE-SU-2026:10514-1OPENSUSE-SU-2026:10525-1OPENSUSE-SU-2026:20570-1OPENSUSE-SU-2026:20571-1

Timeline

  1. 08-04-2026
    PublishedVulnerability first disclosed.
  2. 13-04-2026
    Last modifiedVulnerability information updated.

Description

tar.Reader can allocate an unbounded amount of memory when reading a maliciously-crafted archive containing a large number of sparse regions encoded in the "old GNU sparse map" format.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

-0.11 pp

From 0.29% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.18%

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

Chainguard200 products
  • aactl< 0.4.12-r53
  • act< 0.2.87-r2
  • actions-runner-controllerAll versions (No fix recorded)
  • actions-runner-controller-fipsAll versions (No fix recorded)
  • addon-resizerAll versions (No fix recorded)

1 vendor · 200 products · Showing 200 of 3807. Use Open JSON for the complete list.

References

10 links