CVE-2026-102877

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.

CVSS v3 4.4 MEDIUM

4.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/getfider/fider
https://github.com/getfider/fider/blob/v0.37.0/app/pkg/validate/general.go
https://github.com/getfider/fider/blob/v0.37.0/app/services/httpclient/httpclient.go
https://github.com/getfider/fider/commit/45f5627b9fd15b912fb9092635c863fb4c91dd69
https://github.com/getfider/fider/releases/tag/v0.38.0
https://github.com/getfider/fider/security/advisories/GHSA-whx4-hxwq-qgjh
https://www.vulncheck.com/advisories/fider-before-0.38.0-ssrf-via-dns-rebinding-in-webhook-validation

Configurations

No configuration.

History

29 Sep 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-29 20:17

Updated : 2026-09-30 20:17

NVD link : CVE-2026-102877

Mitre link : CVE-2026-102877

CVE.ORG link : CVE-2026-102877

JSON object : View

Products Affected

No product.

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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