CVE-2026-71271

EUVD-2026-53356
Memos' webhook URL validation, isReservedIP (internal/webhook/validate.go), checks a candidate IP against a reservedCIDRs list that omits 0.0.0.0/8 and never calls ip.IsUnspecified — unlike the correctly implemented sibling function isInternalIP in internal/httpgetter/html_meta.go, which does.
SSRF
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
TuranSecCNA
8.5 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 15.32%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
usememosmemos
𝑥
≤ 0.29.1
CNA
Common Weakness Enumeration
References
https://github.com/usememos/memos
https://github.com/usememos/memos/blob/main/internal/webhook/validate.go