SARA / Free Tools / CVE / CVE-2019-3902

CVE-2019-3902 — A flaw was found in Mercurial before 4

A flaw was found in Mercurial before 4.9. It was possible to use symlinks and subrepositories to defeat Mercurial's path-checking logic and write files outside a repository.

CVSS
5.1 MEDIUM
EPSS
0.55% (top 32.30%)
CWE
CWE-22
Published
2019-04-22T15:29:13.000Z
Last modified
2024-08-04T19:26:26.699Z
CVSS vector
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

01What is this vulnerability?

A flaw was found in Mercurial before 4.9. It was possible to use symlinks and subrepositories to defeat Mercurial's path-checking logic and write files outside a repository.

02Affected products

VendorProductVersions
The Mercurial Projectmercurialbefore 4.9

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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