GHSA-qpf5-3wfw-fh7q: Duplicate Advisory Denial of Service Vulnerability

HIGH
Share
CVSS 7.5
CWE-1333
Published
Advisory Summary

GHSA-qpf5-3wfw-fh7q is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-1333: Inefficient Regular Expression Complexity) affecting Duplicate Advisory libraries in the PyPI ecosystem. The issue involves denial of service via catastrophic backtracking (redos) in actor.name_email_regex — commit author/committer field parsing. Remediation is available in the latest vendor maintenance releases.

GHSA-qpf5-3wfw-fh7q at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-qpf5-3wfw-fh7q
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-1333: Inefficient Regular Expression Complexity
Affected Product Duplicate Advisory
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix GHSA-qpf5-3wfw-fh7q

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

gitpython fixed: Latest secure release 
pip install gitpython>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show gitpython

How to Check if You Are Affected

To determine whether your Python environment is affected by GHSA-qpf5-3wfw-fh7q, inspect your installed packages using pip:

pip show gitpython

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show gitpython command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1333: Inefficient Regular Expression Complexity, where the product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-g5vv-9gxw-82hx. This link is maintained to preserve external references. ## Original Description GitPython before 3.1.60 contains a regular expression denial of service vulnerability in Actor.name_email_regex that processes commit author and committer fields. Attackers can craft a commit object with a malformed author field containing an unterminated angle bracket to cause quadratic backtracking, exhausting CPU resources for over two minutes per commit access.

GHSA-qpf5-3wfw-fh7q Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
gitpython
pypi/gitpython
PyPI
≤ 3.1.59

References

GitHub Advisory / Wiki ADVISORY
https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-g5vv-9gxw-82hx
NVD — GHSA-qpf5-3wfw-fh7q NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-87819
www.vulncheck.com/advisories/gitpytho... WEB
https://www.vulncheck.com/advisories/gitpython-before-3.1.60-denial-of-service-via-redos

Frequently Asked Questions

What is GHSA-qpf5-3wfw-fh7q?
GHSA-qpf5-3wfw-fh7q is a security vulnerability in Duplicate Advisory involving Denial of Service via catastrophic backtracking (ReDoS) in Actor.name_email_regex — commit author/committer field parsing under CWE-1333: Inefficient Regular Expression Complexity.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: gitpython.
What version fixes GHSA-qpf5-3wfw-fh7q?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is gitpython affected?
Yes, gitpython is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-qpf5-3wfw-fh7q?
GHSA-qpf5-3wfw-fh7q has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with GHSA-qpf5-3wfw-fh7q?
GHSA-qpf5-3wfw-fh7q is classified under CWE-1333: Inefficient Regular Expression Complexity (The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.).
How can I check PyPI dependencies for GHSA-qpf5-3wfw-fh7q?
Run the dependency tree command: 'pip show gitpython'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qpf5-3wfw-fh7q",
  "modified" : "2026-09-30T23:29:03Z",
  "published" : "2026-09-09T12:32:15Z",
  "withdrawn" : "2026-09-30T23:29:03Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Denial of Service via catastrophic backtracking (ReDoS) in Actor.name_email_regex — commit author/committer field parsing",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-g5vv-9gxw-82hx. This link is maintained to preserve external references.\n\n## Original Description\nGitPython before 3.1.60 contains a regular expression denial of service vulnerability in Actor.name_email_regex that processes commit author and committer fields. Attackers can craft a commit object with a malformed author field containing an unterminated angle bracket to cause quadratic backtracking, exhausting CPU resources for over two minutes per commit access.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "gitpython"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "3.1.59"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-g5vv-9gxw-82hx"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-87819"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/gitpython-before-3.1.60-denial-of-service-via-redos"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1333" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-30T23:29:03Z",
    "nvd_published_at" : "2026-09-09T12:17:17Z"
  }
}