CVE-2026-10268

1.9 lowEPSS 0.1%

Low (1.9). EPSS 0.1% chance of exploitation in the next 30 days.

A weakness has been identified in janet-lang janet up to 1.41.0. This vulnerability affects the function unmarshal_one_fiber of the file src/core/marsh.c. Executing a manipulation can lead to integer overflow. It is possible to launch the attack on the local host. The exploit has been made available to the public and could be used for attacks. This patch is called d9b1d711ea1fde52ac73a82088b512a3e17bad0d. A patch should be applied to remediate this issue.

Severity

CVSS 4.0

1.9 low

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

CVSS 3.1

3.3 low

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 1% of CVEs (scores of 2026-11-01)
CWEs: CWE-189, CWE-190
Published: 2026-06-01
Modified: 2026-07-22
Record from: the NVD, synced 2026-10-19

References

https://github.com/biniamf/pocs/tree/main/janet-marsh-unmarshal-intovf
https://github.com/janet-lang/janet/
https://github.com/janet-lang/janet/commit/d9b1d711ea1fde52ac73a82088b512a3e17bad0d
https://github.com/janet-lang/janet/issues/1744
https://vuldb.com/cve/CVE-2026-10268

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