CVE-2021-42581

9.1 criticalEPSS 1.4%

Critical (9.1) in ramdajs ramda. EPSS 1.4% chance of exploitation in the next 30 days.

Prototype poisoning in function mapObjIndexed in Ramda 0.27.0 and earlier allows attackers to compromise integrity or availability of application via supplying a crafted object (that contains an own property "__proto__") as an argument to the function. NOTE: the vendor disputes this because the observed behavior only means that a user can create objects that the user didn't know would contain custom prototypes

Severity

CVSS 3.1

9.1 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

EPSS: 1.4% chance of exploitation in the next 30 days; higher than 72% of CVEs (scores of 2026-10-31)
CWE: CWE-1321
Published: 2022-05-10
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

ramdajs:ramda

References

https://github.com/ramda/ramda/pull/3192
https://jsfiddle.net/3pomzw5g/2/
https://github.com/ramda/ramda/pull/3192
https://jsfiddle.net/3pomzw5g/2/

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