Answer in brief
CVE-2026-71557 records a Medium severity (CVSS 6.3) vulnerability in go-git: Malicious reference names may modify files outside the reference storage. The current sources do not mark it as known exploited. The current feed maps go-git/go-git (generic), github.com/go-git/go-git/v5 (go), github.com/go-git/go-git/v6 (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-71557 records a Medium severity (CVSS 6.3) vulnerability in go-git: Malicious reference names may modify files outside the reference storage. The current sources do not mark it as known exploited. The current feed maps go-git/go-git (generic), github.com/go-git/go-git/v5 (go), github.com/go-git/go-git/v6 (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.3. 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.
The current feed maps go-git/go-git (generic), github.com/go-git/go-git/v5 (go), github.com/go-git/go-git/v6 (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| go-git/go-gitgeneric | < 5.19.2 || >= 6.0.0-alpha.1, < 6.0.0-alpha.5 | Not reported |
| github.com/go-git/go-git/v5go | <=5.19.1 | 5.19.2 |
| github.com/go-git/go-git/v6go | <=6.0.0-alpha.4 | 6.0.0-alpha.5 |
Published upstream
Aug 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 7, 2026
go-git is an extensible git implementation library written in pure Go. Prior to 5.19.2 and 6.0.0-alpha.5, reference names are not sanitized before being used to construct on-disk paths under the reference storage directory, so a maliciously crafted reference name (for example containing directory-traversal sequences) can cause go-git to write files outside the intended reference storage directory. Versions 5.19.2 and 6.0.0-alpha.5 fix the issue.
Quoted source text, attributed separately from HOL analysis.
CVSS is 6.3. 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.
The current feed maps go-git/go-git (generic), github.com/go-git/go-git/v5 (go), github.com/go-git/go-git/v6 (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| go-git/go-gitgeneric | < 5.19.2 || >= 6.0.0-alpha.1, < 6.0.0-alpha.5 | Not reported |
| github.com/go-git/go-git/v5go | <=5.19.1 | 5.19.2 |
| github.com/go-git/go-git/v6go | <=6.0.0-alpha.4 | 6.0.0-alpha.5 |
Published upstream
Aug 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 7, 2026
go-git is an extensible git implementation library written in pure Go. Prior to 5.19.2 and 6.0.0-alpha.5, reference names are not sanitized before being used to construct on-disk paths under the reference storage directory, so a maliciously crafted reference name (for example containing directory-traversal sequences) can cause go-git to write files outside the intended reference storage directory. Versions 5.19.2 and 6.0.0-alpha.5 fix the issue.
Quoted source text, attributed separately from HOL analysis.