CVE-2026-119285: gofiber fiber · Origin Validation Error
Affects gofiber fiberSource CVE Database V5
Not known to be exploited · CVSS 5.9 Medium : upgrade to 2.52.3 when convenient.
Data as of 29 Oct 2026, 21:59 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 3.1 | 5.9 |
|---|
- Patch
- Available – fixed in 2.52.3
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 29 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade fiber and github.com/gofiber/fiber to 2.52.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| gofiberfiber | Affected
| Fixed in
|
Gogithub.com/gofiber/fiberpkg:golang/github.com/gofiber/fiberOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade Fiber to version 2.52.3 or later, where this vulnerability is fixed. No other mitigation is indicated by the vendor advisory.
Description
A vulnerability in the Fiber web framework versions 2.52.1 and 2.52.2 affects the CORS middleware's domain validation. The validateDomain wildcard matcher improperly strips the scheme and only checks for a host suffix without requiring a dot boundary. This allows an attacker-controlled origin with a host ending in the configured base domain to bypass restrictions when wildcard-subdomain AllowOrigins and AllowCredentials are enabled, potentially exposing authenticated cross-origin responses to the attacker. The issue is fixed in version 2.52.3.