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CVE-2026-10268

janet-lang janet marsh.c unmarshal_one_fiber integer overflow

LOW

3.3

CVSS Score

Published: June 1, 2026 at 03:00 PM UTC

Updated: July 22, 2026 at 07:37 AM UTC

1 product affected across 1 vendorJanet

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Severity

LOW3.3

Exploit prediction

EPSS 0.1%

SSVC

PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Janet · Janet Lang

60%

1.0 1.1 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.2 1.20 1.21 1.22 1.23 1.24 1.25 1.26 1.27 1.28 1.29 1.3 1.30 1.31 1.32 1.33 1.34 1.35 1.36 1.37 1.38 1.39 1.4 1.40 1.41.0 1.5 1.6 1.7 1.8 1.9

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://github.com/janet-lang/janet/commit/d9b1d711ea1fde52ac73a82088b512a3e17bad0d

References (8)

VDB EntryTechnical Description

Source: cverecord

https://vuldb.com/vuln/367547

SignaturePermissions Required

Source: cverecord

https://vuldb.com/vuln/367547/cti

Third Party Advisory

Source: cverecord

https://vuldb.com/cve/CVE-2026-10268

Third Party Advisory

Source: cverecord

https://vuldb.com/submit/825075

Issue Tracking

Source: cverecord

https://github.com/janet-lang/janet/issues/1744

Exploit

Source: cverecord

https://github.com/biniamf/pocs/tree/main/janet-marsh-unmarshal-intovf

Patch

Source: cverecord

https://github.com/janet-lang/janet/commit/d9b1d711ea1fde52ac73a82088b512a3e17bad0d

Product

Source: cverecord

https://github.com/janet-lang/janet/

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.3LOWVulDB

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-190CWE-189

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