CVE-2023-26121 — All versions of the package safe-eval are vulnerable to Prototype Pollution via

All versions of the package safe-eval are vulnerable to Prototype Pollution via the safeEval function, due to improper sanitization of its parameter content.

01What is this vulnerability?

All versions of the package safe-eval are vulnerable to Prototype Pollution via the safeEval function, due to improper sanitization of its parameter content.

02Affected products

Vendor	Product	Versions
n	a / safe	eval — 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: 2023-04-11T05:00:01.308Z
• Last modified: 2025-02-10T15:16:54.743Z

09References

• security.snyk.io — https://security.snyk.io/vuln/SNYK-JS-SAFEEVAL-3373062
• gist.github.com — https://gist.github.com/seongil-wi/9d9fc0cc5b7b130419cd45827e59c4f9
• github.com — https://github.com/hacksparrow/safe-eval/issues/28