CVE-2023-26143 — Versions of the package blamer before 1

Versions of the package blamer before 1.0.4 are vulnerable to Arbitrary Argument Injection via the blameByFile() API. The library does not sanitize for user input or validate the given file path conforms to a specific schema, nor does it properly pass command-line flags to the gi

01What is this vulnerability?

Versions of the package blamer before 1.0.4 are vulnerable to Arbitrary Argument Injection via the blameByFile() API. The library does not sanitize for user input or validate the given file path conforms to a specific schema, nor does it properly pass command-line flags to the git binary using the double-dash POSIX characters (--) to communicate the end of options.

02Affected products

Vendor	Product	Versions
n	a / blamer	0

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

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

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

• Published: 2023-09-19T05:00:01.083Z
• Last modified: 2024-09-25T15:25:49.067Z

09References

• security.snyk.io — https://security.snyk.io/vuln/SNYK-JS-BLAMER-5731318
• gist.github.com — https://gist.github.com/lirantal/14c3686370a86461f555d3f0703e02f9
• github.com — https://github.com/kucherenko/blamer/commit/0965877f115753371a2570f10a63c455d2b2…