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CVE-2026-33811

Medium

Elevated severity or exploit probability.

CVSS base
7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS — probability of exploitation (30 days)
0.8%
55.4th percentile
CISA KEV
Not listed
Weakness / dates
CWE-1341
Published 2026-05-07 · modified 2026-09-18

CVSS breakdown

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

Attack VectorNNetwork
Attack ComplexityLLow
Privileges RequiredNNone
User InteractionNNone
ScopeUUnchanged
ConfidentialityNNone
IntegrityNNone
AvailabilityHHigh

Timeline

Description

When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.

Affected

golang

References

Official: NVD · CVE.org