CVE Explorer
CVE-2026-44332
Fiber is an Express inspired web framework written in Go. Prior to 3.3.0, the default Authorizer function in the BasicAuth middleware in middleware/basicauth/config.go uses short-circuit evaluation that skips password hash comparison for non-existent usernames, enabling reliable remote username enumeration through response timing differences. This issue is fixed in version 3.3.0.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"fiber","vendor":"gofiber","versions":[{"status":"affected","version":"< 3.3.0"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:15678cb1cdfee070126a635dca2b5ae013b4c92c1a3b1e7e8dbf1dc825aab493 · sha256:4b336a6f49b21830… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:15678cb1cdfee070126a635dca2b5ae013b4c92c1a3b1e7e8dbf1dc825aab493 · sha256:4b336a6f49b21830… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-203","description":"CWE-203: Observable Discrepancy","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:15678cb1cdfee070126a635dca2b5ae013b4c92c1a3b1e7e8dbf1dc825aab493 · sha256:4b336a6f49b21830… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059e","tags":["x_refsource_MISC"],"url":"https://github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059e"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:15678cb1cdfee070126a635dca2b5ae013b4c92c1a3b1e7e8dbf1dc825aab493 · sha256:4b336a6f49b21830… · /containers/cna/references/2
{"name":"https://github.com/gofiber/fiber/pull/4245","tags":["x_refsource_MISC"],"url":"https://github.com/gofiber/fiber/pull/4245"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:15678cb1cdfee070126a635dca2b5ae013b4c92c1a3b1e7e8dbf1dc825aab493 · sha256:4b336a6f49b21830… · /containers/cna/references/1
{"name":"https://github.com/gofiber/fiber/releases/tag/v3.3.0","tags":["x_refsource_MISC"],"url":"https://github.com/gofiber/fiber/releases/tag/v3.3.0"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:15678cb1cdfee070126a635dca2b5ae013b4c92c1a3b1e7e8dbf1dc825aab493 · sha256:4b336a6f49b21830… · /containers/cna/references/3
{"name":"https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:15678cb1cdfee070126a635dca2b5ae013b4c92c1a3b1e7e8dbf1dc825aab493 · sha256:4b336a6f49b21830… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.