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TI-2026-03443 Aliases CVE-2026-3979GHSA-gr63-2w3v-w2gp

quickjs-ng quickjs quickjs.c js_iterator_concat_return use after free

Priority MEDIUM 55CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

A flaw has been found in quickjs-ng quickjs up to 0.12.1. This affects the function js_iterator_concat_return of the file quickjs.c. This manipulation causes use after free. The attack requires local access. The exploit has been published and may be used. Patch name: daab4ad4bae4ef071ed0294618d6244e92def4cd. Applying a patch is the recommended action to fix this issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00132 2nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
quickjs-ngquickjs0.12.0; 0.12.1—No fix listedCNA
  • quickjs Vendorquickjs-ng Affected 0.12.0; 0.12.1 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:quickjs-ng:quickjs:*:*:*:*:*:*:*:*——quickjs-ng
  • cpe:2.3:a:quickjs-ng:quickjs:*:*:*:*:*:*:*:* Versions — — ·quickjs-ng

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-2026-3979
  2. 2026-10-03 Alias added: GHSA-gr63-2w3v-w2gp

References

Exploit 1

Patch 2

Other 2

  • TI-2026-00603 quickjs-ng quickjs quickjs.c js_typed_array_constructor heap-based overflow CVSS 4.0MEDIUM 6.9
  • TI-2025-29366 quickjs-ng through 0.9.0 has an incorrect size calculation in JS_ReadBigInt for a BigInt… CVSS 3.1HIGH 8.4
  • TI-2026-83831 Heap buffer overflow in QuickJS-NG TypedArray sort on 32-bit hosts CVSS 4.0HIGH 8.3
  • TI-2025-29365 Resource allocation without limits in QuickJS CVSS 3.1HIGH 7.8
  • TI-2026-00873 quickjs-ng quickjs quickjs.c js_typed_array_constructor_ta heap-based overflow CVSS 4.0MEDIUM 5.3
  • TI-2026-00872 quickjs-ng quickjs Atomics Ops quickjs.c use after free CVSS 4.0MEDIUM 5.3
See all 10 →

Sources

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