Prototype poisoning in function mapObjIndexed in Ramda 0.27.0 and earlier allows…
Priority MEDIUM 42CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · High
- Fix status
- Partial Red Hat: 1 fixed, 5 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
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
Why it matters now
EPSS 0.01386 72nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 5 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
Red Hat 1 advisory
- RHSA-2023:3642 Released 2023-06-15 · Red Hat rating ImportantRed Hat Ceph Storage 6.1 Container security and bug fix update
- Red Hat Ceph Storage 6.1 Tools rhceph/keepalived-rhel9, rhceph/rhceph-6-dashboard-rhel9, rhceph/rhceph-6-rhel9 +3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| OpenShift Service Mesh 2.1 | Affected | No fix planned: Will not fix |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix planned: Will not fix |
| Red Hat Ceph Storage 5 | Affected | No fix yet |
| Red Hat Decision Manager 7 | Affected | No fix yet: Fix deferred |
| Red Hat Process Automation 7 | Affected | No fix yet: Fix deferred |
| Red Hat Ceph Storage 6.1 Tools | Fixed | RHSA-2023:3642 |
Not affected: 7 products
- Migration Toolkit for Virtualization
- Red Hat A-MQ Online
- Red Hat Advanced Cluster Management for Kubernetes 2
- Red Hat Ceph Storage 6.1 Tools
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Openshift Data Foundation 4
Timeline
- 2026-10-02 Threatist record created from CVE-2021-42581
- 2026-10-03 Alias added: GHSA-x9wq-pxpv-8p4v
References
Sources
- CVE-2021-42581 · CVE Program
- CVE-2021-42581 · NVD
- FIRST EPSS
- GHSA-x9wq-pxpv-8p4v · GitHub Advisory Database · CC BY 4.0
- CVE-2021-42581 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences