An issue was discovered in JerryScript 2.4.0.
Priority LOW 31CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.
Summary
An issue was discovered in JerryScript 2.4.0. There is a heap-use-after-free in ecma_is_lexical_environment in the ecma-helpers.c file.
Why it matters now
EPSS 0.00937 61st 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:jerryscript:jerryscript:2.4.0:*:*:*:*:*:*:* | 2.4.0 | Vulnerable | JerryScript |
- cpe:2.3:a:jerryscript:jerryscript:2.4.0:*:*:*:*:*:*:* Versions 2.4.0 Vulnerable ·JerryScript
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-26194
- 2026-10-03 Alias added: GHSA-h4xg-pg5p-4qf7
References
More Jerryscript vulnerabilities
- TI-2023-20218 Buffer Overflwo vulnerability in JerryScript Project jerryscript v.3.0.0 allows a remote… CVSS 3.1CRITICAL 9.8
- TI-2023-18120 Buffer Overflow vulnerability in JerryScript version 3.0, allows remote attackers to… CVSS 3.1CRITICAL 9.8
- TI-2020-14354 An issue in Jerrscript- project Jerryscrip v. CVSS 3.1CRITICAL 9.8
- TI-2023-17424 Jerryscript 3.0 (commit 05dbbd1) was discovered to contain an Assertion Failure via the… CVSS 3.1HIGH 7.5
- TI-2023-15262 Jerryscript 3.0 (commit 05dbbd1) was discovered to contain a heap-buffer-overflow via the… CVSS 3.1HIGH 7.8
- TI-2023-15261 Jerryscript 3.0 (commit 05dbbd1) was discovered to contain a heap-buffer-overflow via the… CVSS 3.1HIGH 7.8
Sources
- CVE-2021-26194 · CVE Program
- CVE-2021-26194 · NVD
- FIRST EPSS
- GHSA-h4xg-pg5p-4qf7 · GitHub Advisory Database · CC BY 4.0
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