Read the docs
TI-2021-21253 Aliases CVE-2021-46463GHSA-rcr4-6fgm-fjc6

njs through 0.7.1, used in NGINX, was discovered to contain a control flow hijack caused…

Priority MEDIUM 45CWE-843Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-843 and the CVSS impact.

Summary

njs through 0.7.1, used in NGINX, was discovered to contain a control flow hijack caused by a Type Confusion vulnerability in njs_promise_perform_then().

Why it matters now

EPSS 0.01676 77th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:f5:njs:*:*:*:*:*:*:*:*up to 0.7.1VulnerableF5
  • cpe:2.3:a:f5:njs:*:*:*:*:*:*:*:* Versions up to 0.7.1 Vulnerable ·F5

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-46463
  2. 2026-10-03 Alias added: GHSA-rcr4-6fgm-fjc6

References

Exploit 1

Patch 1

Advisory 1

  • TI-2022-21129 Nginx NJS v0.7.2 was discovered to contain a heap-use-after-free bug caused by illegal… CVSS 3.1CRITICAL 9.8
  • TI-2020-13678 Buffer Overflow found in Nginx NJS allows a remote attacker to execute arbitrary code via… CVSS 3.1CRITICAL 9.8
  • TI-2020-13676 Buffer Overflow vulnerabilty found in Nginx NJS v.0feca92 allows a remote attacker to… CVSS 3.1CRITICAL 9.8
  • TI-2023-12380 Nginx NJS v0.7.10 was discovered to contain a segmentation violation via the function… CVSS 3.1HIGH 7.5
  • TI-2023-12378 Nginx NJS v0.7.10 was discovered to contain a segmentation violation via the function… CVSS 3.1HIGH 7.5
  • TI-2023-12377 Nginx NJS v0.7.10 was discovered to contain a segmentation violation via the function… CVSS 3.1HIGH 7.5
See all 39 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences