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CVE-2026-50131

CVE.org · Published

Historical CVEsJSONAI instructions

Record status
Published
Identifier year (not publication year)
2026
Source publication
Source updated
Imported by cveboard
Source snapshot
cve_2026-10-24_midnight_baseline ·

Plain text

CNA source text (English)

Fedify has an incomplete SSRF mitigation after GHSA-p9cg-vqcc-grcx: validatePublicUrl allows special-use IPv4 ranges

Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Fedify previously addressed SSRF/internal network access in GHSA-p9cg-vqcc-grcx by adding public URL validation before runtime document and media fetching. However, the IPv4 validation logic present starting in version 0.11.2 and prior to versions 1.9.12, 1.10.11, 2.0.19, 2.1.15, and 2.2.4 appears incomplete. The `validatePublicUrl()` protection relies on `isValidPublicIPv4Address()` to reject non-public IPv4 destinations. The function blocks common private and local ranges such as `10.0.0.0/8`, `127.0.0.0/8`, `169.254.0.0/16`, `172.16.0.0/12`, and `192.168.0.0/16`, but it still treats several special-use, reserved, multicast, benchmarking, and carrier-grade NAT IPv4 ranges as valid public destinations. Because this validation is used as an SSRF defense before outbound fetches, this appears to be an incomplete mitigation or bypass class for the previous SSRF issue. Versions 1.9.12, 1.10.11, 2.0.19, 2.1.15, and 2.2.4 contain an updated patch.

Scoped product and version facts

Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.

Exploitation unknown; this catalogue does not assess exploitation.

fedify

Vendor
fedify-dev
Product
fedify
Platforms
Unknown
Default status
Unknown
fedify · Scoped product and version facts
Version (version)Status (status)Version scheme (versionType)Exclusive end (lessThan)Inclusive end (lessThanOrEqual)Status changes (at → status)
>= 0.11.2, < 1.9.12affectedUnavailableUnavailableUnavailableNone listed
>= 1.10.0, < 1.10.11affectedUnavailableUnavailableUnavailableNone listed
>= 2.0.0, < 2.0.19affectedUnavailableUnavailableUnavailableNone listed
>= 2.1.0, < 2.1.15affectedUnavailableUnavailableUnavailableNone listed
>= 2.2.0, < 2.2.4affectedUnavailableUnavailableUnavailableNone listed

vocab-runtime

Vendor
fedify-dev
Product
vocab-runtime
Platforms
Unknown
Default status
Unknown
vocab-runtime · Scoped product and version facts
Version (version)Status (status)Version scheme (versionType)Exclusive end (lessThan)Inclusive end (lessThanOrEqual)Status changes (at → status)
< 2.0.19affectedUnavailableUnavailableUnavailableNone listed
>= 2.1.0, < 2.1.15affectedUnavailableUnavailableUnavailableNone listed
>= 2.2.0, < 2.2.4affectedUnavailableUnavailableUnavailableNone listed