Security Digest · Vulnerability record
CVE-2024-51990: jj vulnerable to path traversal via crafted Git repositories
jj, or Jujutsu, is a Git-compatible VCS written in rust.
CVSS 9.3 Critical EPSS 0.6% · p49
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- 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.
From the GitHub advisory
Impact
Specially crafted Git repositories can cause jj to write files outside the clone.
Patches
Fixed in 0.23.0.
Workarounds
Weakness type: CWE-22.
Product: jj-lib (crates.io (Rust)) · Assigned by: GitHub_M · Published: 2024-11-07
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| crates.io (Rust) | jj-lib | < 0.23.0 | 0.23.0 |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| martinvonz | jj | < 0.23.0 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_M | 4.0 | 9.3 Critical | 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 | 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 |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Attack requirements: none
- Privileges required: none (no login)
- User interaction: none
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- 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.
Timeline
- — CVE record last updated
- — CVE record published by GitHub_M
- — GitHub-reviewed advisory GHSA-88h5-6w7m-5w56 published (critical)
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-88h5-6w7m-5w56 github.com
- CVE.org record CVE-2024-51990 cve.org
- NVD entry CVE-2024-51990 nvd.nist.gov
Other references from the CVE record and advisory
- github.com github.com
Critical crates.io (Rust) advisories · Today’s Security Digest