OSV-2026-1309
Heap-buffer-overflow in janet_bytecode_movopt_basic_block
No scoreFix available
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=563659412
Crash type: Heap-buffer-overflow READ 4
Crash state:
janet_bytecode_movopt_basic_block
janet_bytecode_movopt_full
janet_bytecode_optimize
What each source reports
OSV No score
Heap-buffer-overflow in janet_bytecode_movopt_basic_block
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=563659412
Crash type: Heap-buffer-overflow READ 4
Crash state:
janet_bytecode_movopt_basic_block
janet_bytecode_movopt_full
janet_bytecode_optimize
- Record
OSV-2026-1309- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
janetOSS-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-2026-1309 is a vulnerability with no CVSS score yet in janet, published September 21, 2026. No source lists public exploit code. A source reports a fix.