CVE-2023-26143

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-09-19 · updated 2026-06-17
Weakness: CWE-88

Description

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.

Affected products

blamer: before 1.0.4 — fixed in 1.0.4

How to fix

Upgrade to a fixed version: blamer 1.0.4. Check the vendor advisory for mitigations.

References

https://gist.github.com/lirantal/14c3686370a86461f555d3f0703e02f9
https://github.com/kucherenko/blamer/commit/0965877f115753371a2570f10a63c455d2b2cde3
https://security.snyk.io/vuln/SNYK-JS-BLAMER-5731318
https://gist.github.com/lirantal/14c3686370a86461f555d3f0703e02f9
https://github.com/kucherenko/blamer/commit/0965877f115753371a2570f10a63c455d2b2cde3
https://security.snyk.io/vuln/SNYK-JS-BLAMER-5731318

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