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TI-2021-21256 Aliases CVE-2021-46477GHSA-wv49-q2r3-4933

Jsish v3.5.0 was discovered to contain a heap buffer overflow via RegExp_constructor in…

Priority LOW 26CWE-787Published · Updated

Key facts

Attack vector
Local
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-787 and the CVSS impact.

Summary

Jsish v3.5.0 was discovered to contain a heap buffer overflow via RegExp_constructor in src/jsiRegexp.c. This vulnerability can lead to a Denial of Service (DoS).

Why it matters now

EPSS 0.00692 53rd 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:jsish:jsish:3.5.0:*:*:*:*:*:*:*3.5.0VulnerableJsish
  • cpe:2.3:a:jsish:jsish:3.5.0:*:*:*:*:*:*:* Versions 3.5.0 Vulnerable ·Jsish

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-46477
  2. 2026-10-03 Alias added: GHSA-wv49-q2r3-4933

References

Exploit 1

  • TI-2025-40399 A type confusion in jsish 2.0 allows incorrect control flow during execution of the… CVSS 3.1CRITICAL 9.8
  • TI-2024-16031 Jsish v3.5.0 (commit 42c694c) was discovered to contain a stack-overflow via the… CVSS 3.1CRITICAL 9.8
  • TI-2024-16033 Jsish v3.5.0 (commit 42c694c) was discovered to contain a use-after-free via the SplitChar at ./src/jsiUtils.c. CVSS 3.1CRITICAL 9.8
  • TI-2020-14504 An issue found in Jsish v.3.0.11 and before allows an attacker to cause a denial of… CVSS 3.1HIGH 7.5
  • TI-2024-16032 Jsish v3.5.0 was discovered to contain a heap-buffer-overflow in ./src/jsiUtils.c. CVSS 3.1CRITICAL 9.8
  • TI-2020-14415 Integer overflow vulnerability in function Jsi_ObjSetLength in jsish before 3.0.6, allows… CVSS 3.1CRITICAL 9.8
See all 52 →

Sources

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