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Back to active CVEs
Medium · CVSS 6.7CVE-2026-121522

Possible panic from Git source resolverCVE-2026-121522

Answer in brief

CVE-2026-121522 records a Medium severity (CVSS 6.7) vulnerability in Possible panic from Git source resolver. The current sources do not mark it as known exploited. The current feed maps moby/BuildKit (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 3, 2026Updated Nov 3, 2026Source checked Nov 3, 2026First seen by HOL Nov 3, 2026Material review Nov 3, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.7
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps moby/BuildKit (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
moby/BuildKitgeneric>=0.26.0 <0.34.20.34.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for moby/BuildKit.
  2. 2Review the reported fix. Source-reported solution: Upgrade BuildKit to v0.34.2 or later.

Evidence timeline and material changes

  1. Published upstream

    Nov 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 3, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
Upstream source description

In BuildKit versions v0.26.0 through v0.34.1, a specific build definition that resolves metadata for the same Git source reference twice can cause the BuildKit daemon to panic and crash, interrupting builds handled by that daemon. The issue is fixed in v0.34.2.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Malicious client could set xattr value outside of BuildKit state directorySame moby/buildkit package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-476
Source
CVE List V5
Source checked
Nov 3, 2026
References
1 linked source
Open source record