CVE-2021-33796
In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may...
In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.
- Record
CVE-2021-33796- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
EUVDEUVD-2021-20473
In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.
- Record
EUVD-2021-20473- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-pc6c-fw6q-cfhj
In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may...
In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.
- Record
GHSA-pc6c-fw6q-cfhj- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
NVD
In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.
- Record
CVE-2021-33796- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
OSV
In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.
- Record
CVE-2021-33796- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-33796
In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.
- Record
DEBIAN-CVE-2021-33796- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-33796
In MuJS before version 1.1.2, a use-after-free flaw in the regexp source property access may cause denial of service.
- Record
UBUNTU-CVE-2021-33796- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | ||
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-33796 is a critical vulnerability (CVSS 10.0) in Artifex Mujs, published July 7, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.71%, the 53rd percentile. Fixed in mujs 1.1.3-2.