CVE-2026-10268

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.12% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 2.1% of scored records. A rank, not a probability.

NVD base score

1.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-07-22.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-06-01 15:00Z3 MO AGO

Last updated

2026-06-01 17:50Z3 MO AGO

Reserved

2026-05-31

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 4.8)

CNA CVSS vector

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

Weaknesses

• CWE-189
• CWE-190Integer Overflow or WraparoundBase

Data version

5.2

Document digest

014a107c2267913b551b3c542974cf4b9a1a23c7f7c813bd737a9ea56143c44f

• vuldb.comVDB-367547 | janet-lang janet marsh.c unmarshal_one_fiber integer overflowhttps://vuldb.com/vuln/367547vdb-entrytechnical-description
• vuldb.comVDB-367547 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/367547/ctisignaturepermissions-required
• vuldb.comCVE-2026-10268 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-10268third-party-advisory
• vuldb.comSubmit #825075 | janet-lang janet 1.41.0 Integer Overflowhttps://vuldb.com/submit/825075third-party-advisory
• github.comhttps://github.com/janet-lang/janet/issues/1744issue-tracking
• github.comhttps://github.com/biniamf/pocs/tree/main/janet-marsh-unmarshal-intovfexploit
• github.comhttps://github.com/janet-lang/janet/commit/d9b1d711ea1fde52ac73a82088b512a3e17bad0dpatch
• github.comhttps://github.com/janet-lang/janet/product