CVE-2026-41907: uuid: Missing buffer bounds check in `v3`/`v5`/`v6` when `buf` is provided

unknownCVE-2026-41907

CSIRTS triage

vendor: uuid product: uuid Memory corruption

What: Missing buffer bounds check in UUID v3/v5/v6 generation when a buffer is provided.
Who is affected: Applications using the uuid crate's v3, v5, or v6 UUID generation functions with externally-provided buffers.
Urgency: Medium priority; buffer bounds violations can lead to memory corruption, though not yet observed in exploits.
Action: Update to a patched version of the uuid crate that includes proper bounds checking.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41907

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-419070.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-41907	coverage & exploitation status	NVD · CVE.org

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