CVE-2026-102877Fider before 0.38.0 SSRF via DNS rebinding in webhook validation
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 4.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-918
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 30, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
getfider fider getfider:fider (from the name) | before 0.38.0; 0.38.0 not affected | CNA record |
References
- https://github.com/getfider/fider/security/advisories/GHSA-whx4-hxwq-qgjhvendor-advisory
- https://github.com/getfider/fider/commit/45f5627b9fd15b912fb9092635c863fb4c91dd69patch
- https://github.com/getfider/fider/blob/v0.37.0/app/pkg/validate/general.gotechnical-description
- https://github.com/getfider/fider/blob/v0.37.0/app/services/httpclient/httpclient.gotechnical-description
- https://github.com/getfider/fider/releases/tag/v0.38.0release-notes
- https://github.com/getfider/fiderproduct
- https://www.vulncheck.com/advisories/fider-before-0.38.0-ssrf-via-dns-rebinding-in-webhook-validationthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.