Intel

CVE-2026-87817

gitpython: Improper Control of Generation of Code ('Code Injection') (CVE-2026-87817)

highEPSS 0.4%

Description

A flaw was found in GitPython. This vulnerability allows a remote attacker to execute arbitrary code. By failing to properly validate the git directory location, GitPython allows attackers to impersonate the git directory using tracked files such as gitdir, commondir, and HEAD. An attacker can then place a malicious pre-commit hook in the tracked hooks directory, which executes when a victim calls index.commit() on a cloned or opened repository.

Source: redhat_csafsuse_csafOSV (Open Source Vulnerabilities)GitHub Security AdvisoriesNVD (NIST)cvelistv5BSI WID PortalBSI CSAF

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

pypigitpython
0.1.70.2.0-beta10.3.0-beta10.3.0-beta20.3.1-beta20.3.20.3.2.10.3.2.RC10.3.30.3.40.3.50.3.60.3.71.0.01.0.11.0.22.0.02.0.12.0.22.0.32.0.42.0.52.0.62.0.72.0.82.0.92.0.9.dev02.0.9.dev12.1.02.1.12.1.102.1.112.1.122.1.132.1.142.1.152.1.22.1.32.1.42.1.52.1.62.1.72.1.82.1.93.0.03.0.13.0.23.0.3

Metrics

XIEM Effective CVSS
8.8
Source: nvd-v3
EPSS percentile
32.7 %
Elevated — this CVE ranks above at least 10% of all CVEs scored today.
KEV status
—
Show all metrics
Severity
high
Priority score
82.53
Exploit maturity
no public PoC known
CVSS v3
8.8
CVSS v4
8.7
EPSS score
0.4 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-09-30 23:27 UTC
CWE
CWE-94

Weakness classes (CWE)

  • CWE-94Base

    Improper Control of Generation of Code ('Code Injection')

    The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

    cwe.mitre.org →

References & sources

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. Initial Analysis2026-09-16 15:24 UTC· nvd@nist.gov
    • CPE Configuration: OR *cpe:2.3:a:gitpython_project:gitpython:*:*:*:*:*:python:*:* versions up to (excluding) 3.1.60
    • Reference Type: VulnCheck: https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-239g-whfq-7xj9 Types: Exploit, Mitigation, Vendor Advisory
    • Reference Type: VulnCheck: https://www.vulncheck.com/advisories/gitpython-before-3.1.60-remote-code-execution-via-git-directory-impersonation Types: Third Party Advisory
  2. CVE Modified2026-09-10 15:17 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-87817","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"yes"},{"technical…
  3. New CVE Received2026-09-09 12:17 UTC· disclosure@vulncheck.com
    • Description: GitPython before 3.1.60 fails to properly validate the git directory location, allowing attackers to impersonate the git directory using tracked files like gitdir, commondir, and HEAD. Attackers can execute arbitrary code by placing a malicious pre-commit hook in the tracked hooks directory that executes when a victim calls index.commit() on a cloned or opened repository.
    • CVSS V4.0: AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    • CVSS V3.1: AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    • CWE: CWE-94