---
title: "CVE-2024-51990: jj vulnerable to path traversal via crafted Git repositories"
url: https://erroneo.us/security/cve/CVE-2024-51990/
description: "CVE-2024-51990 (jj-lib (crates.io (Rust))): jj, or Jujutsu, is a Git-compatible VCS written in rust. In affected versions specially crafted Git repositories…"
type: vulnerability-record
section: "Security Digest"
date_published: 2024-11-07
date_modified: 2024-11-07
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2024-51990"
kev: false
cvss: 9.3
epss: 0.00615
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2024-51990: jj vulnerable to path traversal via crafted Git repositories

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.6% , percentile 49: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 49% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes jj-lib (crates.io (Rust)) < 0.23.0, fixed in 0.23.0 . Check your lockfile, including transitive dependencies.

## What it is

jj, or Jujutsu, is a Git-compatible VCS written in rust. In affected versions specially crafted Git repositories can cause jj to write files outside the clone. This issue has been addressed in version 0.23.0. Users are advised to upgrade. Users unable to upgrade should avoid cloning repos from unknown sources.

## Affected packages

- crates.io (Rust) `jj-lib` < 0.23.0 → fixed: 0.23.0

## Affected products (CVE record)

- martinvonz jj: < 0.23.0

## Severity

- GitHub_M CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`
- GitHub CVSS 4.0: 9.2 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:H/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.61% probability of exploitation activity in the next 30 days; percentile 49.

## Sources

- [GitHub Advisory GHSA-88h5-6w7m-5w56](https://github.com/advisories/GHSA-88h5-6w7m-5w56)
- [CVE.org record CVE-2024-51990](https://www.cve.org/CVERecord?id=CVE-2024-51990)
- [NVD entry CVE-2024-51990](https://nvd.nist.gov/vuln/detail/CVE-2024-51990)
- [github.com](https://github.com/martinvonz/jj/security/advisories/GHSA-88h5-6w7m-5w56)

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Source page: https://erroneo.us/security/cve/CVE-2024-51990/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt