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TI-2021-13163 Aliases CVE-2021-33796GHSA-pc6c-fw6q-cfhj

In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.

Priority MEDIUM 50CWE-416Published · 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 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00713 53rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MuJSMuJS1.1.1 – all—No fix listedCNA
  • MuJS VendorMuJS Affected 1.1.1 – all Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:artifex:mujs:*:*:*:*:*:*:*:*before 1.1.2VulnerableArtifex
  • cpe:2.3:a:artifex:mujs:*:*:*:*:*:*:*:* Versions before 1.1.2 Vulnerable ·Artifex

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-33796
  2. 2026-10-03 Alias added: GHSA-pc6c-fw6q-cfhj

References

Patch 1

  • TI-2021-13164 Memory corruption in mujs CVSS 3.1CRITICAL 9.8
  • TI-2019-08527 An issue was discovered in Artifex MuJS 1.0.5. CVSS 3.0CRITICAL 9.8
  • TI-2016-08217 An integer overflow vulnerability was observed in the regemit function in regexp.c in… CVSS 3.1CRITICAL 9.8
  • TI-2016-06378 A buffer overflow vulnerability was observed in divby function of Artifex Software, Inc. CVSS 3.0CRITICAL 9.8
  • TI-2016-08209 Heap-based buffer overflow in the js_stackoverflow function in jsrun.c in Artifex… CVSS 3.0CRITICAL 9.8
  • TI-2016-06377 A use-after-free vulnerability was observed in Rp_toString function of Artifex Software… CVSS 3.0CRITICAL 9.8
See all 29 →

Sources

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