EUVD-2026-78439
GHSA-rr6q-fmv4-p23m
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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
Primary rating from Vendor (CIRCL) · only source for this CVE.
CVSS VectorVendor: CIRCL
Lifecycle Timeline
2DescriptionCVE.org
Affected versions of MISP do not consistently apply the existing authentication-failure logging throttle.
Two API authentication failure branches wrote directly to the Log model:
- API requests with no authentication key;
- requests supplying an API key with an incorrect length
Unlike other authentication failures, these paths bypassed _shouldLog(), so every request could create another durable auth_fail entry.
Version affected: ≤2.5.45
AnalysisAI
MISP 2.5.45 and earlier fails to apply its authentication-failure logging throttle on two API auth paths — requests presenting no API key and requests presenting a key of incorrect length — allowing an unauthenticated remote caller to write an unbounded number of durable auth_fail entries into the database. Repeated requests can exhaust storage and degrade or deny availability of the platform (CWE-770). …
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External POC / Exploit Code
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