OSV-2026-764
Heap-use-after-free in JS_DefineProperty
No scoreFix available
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=513811188
Crash type: Heap-use-after-free READ 8
Crash state:
JS_DefineProperty
build_backtrace
JS_CallInternal
What each source reports
OSV No score
Heap-use-after-free in JS_DefineProperty
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=513811188
Crash type: Heap-use-after-free READ 8
Crash state:
JS_DefineProperty
build_backtrace
JS_CallInternal
- Record
OSV-2026-764- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
quickjsOSS-Fuzz |
Commit ranges | Not evaluated |
Not evaluated means the source gave git commits or a range we can't read, so we can't tell which releases are affected. A fixed version beside it is the source’s own claim.
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
OSV-2026-764 is a vulnerability with no CVSS score yet in quickjs, published May 18, 2026. No source lists public exploit code. A source reports a fix.