CVE-2023-26143: Versions of the package blamer before 1.0.4 are vulnerable to Arbitrary Argument Injection via the blameByFile

This week

MEDIUM 6.5REMOTEUPGRADE

CVE-2023-26143 is a medium-severity flaw (CVSS 6.5) affecting blamer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-88
Published	2023-09-19
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: blamer project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-09-19 05:17 UTCPublished CVE record published
2026-06-17 05:42 UTCUpdated Record last modified

blamer project blamer UPGRADE

Affected: < 1.0.4

Fixed in: 1.0.4

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls blamer

2. UPGRADE to 1.0.4

npm install blamer@">=1.0.4"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-26143?

blamer: upgrade to 1.0.4. Exact commands for each OS are on this page.

Is CVE-2023-26143 being exploited?

CVE-2023-26143 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-26143 affect?

CVE-2023-26143 affects blamer. Severity is medium (CVSS 6.5). 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 pr

How urgent is CVE-2023-26143?

Priority 49/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Git vulnerabilities

References

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