CVE-2026-88378
QuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().
QuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().
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
QuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().
- Record
CVE-2026-88378- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
EUVDEUVD-2026-86272
QuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().
- Record
EUVD-2026-86272- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-jww9-7qmq-6hv5
QuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().
QuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().
- Record
GHSA-jww9-7qmq-6hv5- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
NVD
QuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().
- Record
CVE-2026-88378- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
OSV
QuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().
- Record
CVE-2026-88378- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-88378
QuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().
- Record
DEBIAN-CVE-2026-88378- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
OSVUBUNTU-CVE-2026-88378
QuickJS commit 04be24600 contains a heap out-of-bounds write condition in JS_ReadFunctionTag().
- Record
UBUNTU-CVE-2026-88378- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
quickjsDebian:13 |
All versions, plus listed versions 2025.04.26-1 |
None known |
quickjsDebian:14 |
All versions, plus listed versions 2025.04.26-1 |
None known |
quickjs-ngDebian:14 |
All versions, plus listed versions 0.13.0-10.13.0-20.13.0-30.14.0-10.14.0-2 Show 11 moreShow less0.14.0-2~bpo13+10.14.0-2~bpo13+20.15.0-10.15.0-1~bpo13+10.15.1-10.15.1-1~bpo13+10.16.2-10.16.2-20.16.2-2~bpo13+10.17.0-10.18.0-1 |
None known |
quickjsUbuntu:Pro:24.04:LTS |
All versions, plus listed versions 2021.03.27-12021.03.27-1ubuntu0.1~esm1 |
None known |
quickjsUbuntu:26.10 |
All versions, plus listed versions 2025.04.26-1build1 |
None known |
quickjsUbuntu:26.04:LTS |
All versions, plus listed versions 2025.04.26-12025.04.26-1build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-88378 is a critical vulnerability (CVSS 9.8) in quickjs, published September 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.56%, the 46th percentile. No source names a fixed version.
References
github.com/bellard/quickjs/issues/549
nvd.nist.gov/vuln/detail/CVE-2026-88378
security-tracker.debian.org/tracker/CVE-2026-88378
ubuntu.com/security/CVE-2026-88378
cve.org/CVERecord?id=CVE-2026-88378