CVE-2026-102877

Published: Sep 29, 2026Modified: Sep 30, 2026Deferred

2.1

Vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/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

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CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/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:XShow less

Source: disclosure@vulncheck.com (Secondary)

Description

Fider before 0.38.0 contains a server-side request forgery vulnerability due to a time-of-check time-of-use gap in URL validation for webhooks and custom OAuth provider endpoints. Administrators controlling DNS can perform DNS rebinding attacks to make the Fider server send requests to internal services or cloud metadata endpoints.

Related CWEs

Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

References (7)

https://github.com/getfider/fider

Source: disclosure@vulncheck.com

https://github.com/getfider/fider/blob/v0.37.0/app/pkg/validate/general.go

Source: disclosure@vulncheck.com

https://github.com/getfider/fider/blob/v0.37.0/app/services/httpclient/httpclient.go

Source: disclosure@vulncheck.com

https://github.com/getfider/fider/commit/45f5627b9fd15b912fb9092635c863fb4c91dd69

Source: disclosure@vulncheck.com

https://github.com/getfider/fider/releases/tag/v0.38.0

Source: disclosure@vulncheck.com

https://github.com/getfider/fider/security/advisories/GHSA-whx4-hxwq-qgjh

Source: disclosure@vulncheck.com

https://www.vulncheck.com/advisories/fider-before-0.38.0-ssrf-via-dns-rebinding-in-webhook-validation

Source: disclosure@vulncheck.com

Timeline

No history available yet.