CVE-2026-33762

go-git is an extensible git implementation library written in pure Go. Prior to version 5.17.1, go-git’s index decoder for format version 4 fails to validate the path name prefix length before applying it to the previously decoded path name. A maliciously crafted index file can trigger an out-of-bounds slice operation, resulting in a runtime panic during normal index parsing. This issue only affects Git index format version 4. Earlier formats (go-git supports only v2 and v3) are not vulnerable to this issue. This issue has been patched in version 5.17.1.

CVSS v3 2.8 LOW

2.8^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.3 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/go-git/go-git/releases/tag/v5.17.1	Product Release Notes
https://github.com/go-git/go-git/security/advisories/GHSA-gm2x-2g9h-ccm8	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:go-git_project:go-git:*:*:*:*:*:go:*:*

History

No history.

Information

Published : 2026-03-31 15:16

Updated : 2026-07-24 21:10

NVD link : CVE-2026-33762

Mitre link : CVE-2026-33762

CVE.ORG link : CVE-2026-33762

JSON object : View

Products Affected

go-git_project

go-git

CWE

CWE-129

Improper Validation of Array Index

{"id": "CVE-2026-33762", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33762", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-31T18:50:26.187250Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 2.8, "attackVector": "LOCAL", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 1.3}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "go-git", "product": "go-git", "versions": [{"status": "affected", "version": "< 5.17.1"}]}]}], "published": "2026-03-31T15:16:15.597", "references": [{"url": "https://github.com/go-git/go-git/releases/tag/v5.17.1", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/go-git/go-git/security/advisories/GHSA-gm2x-2g9h-ccm8", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-129"}]}], "descriptions": [{"lang": "en", "value": "go-git is an extensible git implementation library written in pure Go. Prior to version 5.17.1, go-git\u2019s index decoder for format version 4 fails to validate the path name prefix length before applying it to the previously decoded path name. A maliciously crafted index file can trigger an out-of-bounds slice operation, resulting in a runtime panic during normal index parsing. This issue only affects Git index format version 4. Earlier formats (go-git supports only v2 and v3) are not vulnerable to this issue. This issue has been patched in version 5.17.1."}, {"lang": "es", "value": "go-git es una biblioteca de implementaci\u00f3n de Git extensible escrita en Go puro. Antes de la versi\u00f3n 5.17.1, el decodificador de \u00edndice de go-git para la versi\u00f3n 4 del formato no valida la longitud del prefijo del nombre de ruta antes de aplicarlo al nombre de ruta decodificado previamente. Un archivo de \u00edndice creado maliciosamente puede desencadenar una operaci\u00f3n de segmento fuera de l\u00edmites, lo que resulta en un p\u00e1nico en tiempo de ejecuci\u00f3n durante el an\u00e1lisis normal del \u00edndice. Este problema solo afecta a la versi\u00f3n 4 del formato de \u00edndice de Git. Formatos anteriores (go-git solo soporta v2 y v3) no son vulnerables a este problema. Este problema ha sido parcheado en la versi\u00f3n 5.17.1."}], "lastModified": "2026-07-24T21:10:00.143", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:go-git_project:go-git:*:*:*:*:*:go:*:*", "vulnerable": true, "matchCriteriaId": "B23FA8A3-7368-4B78-B80A-9BCC2F012738", "versionEndExcluding": "5.17.1"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}