Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-42554

Fiber is a web framework for Go. Prior to 2.52.12 and 3.1.0, Cross-Site Scripting vulnerability in Go Fiber allows a remote attacker to inject arbitrary HTML/JavaScript by supplying Accept: text/html on any request whose handler passes attacker-influenced data to the AutoFormat() feature. The developer opts into content negotiation by calling AutoFormat(), but does not opt into raw HTML emission for a particular request; Fiber chooses that branch from attacker-controlled Accept. The html branch
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:39d16f955f9a7d96464be92eabfb1474f7b63d09f6de4e5935da5814c9689ca9
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":"< 2.52.13"},{"status":"affected","version":">= 3.0.0-beta.2, < 3.1.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f567ddd3d3d130a018d797acd3ee2e07522a5c000bceb25392239412f989ce14 · sha256:3d43cdd7c1998676… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f567ddd3d3d130a018d797acd3ee2e07522a5c000bceb25392239412f989ce14 · sha256:3d43cdd7c1998676… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f567ddd3d3d130a018d797acd3ee2e07522a5c000bceb25392239412f989ce14 · sha256:3d43cdd7c1998676… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/gofiber/fiber/security/advisories/GHSA-qjv7-627w-8qjv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f567ddd3d3d130a018d797acd3ee2e07522a5c000bceb25392239412f989ce14 · sha256:3d43cdd7c1998676… · /containers/adp/0/references/0
{"name":"https://github.com/gofiber/fiber/security/advisories/GHSA-qjv7-627w-8qjv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/gofiber/fiber/security/advisories/GHSA-qjv7-627w-8qjv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f567ddd3d3d130a018d797acd3ee2e07522a5c000bceb25392239412f989ce14 · sha256:3d43cdd7c1998676… · /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.

← Back to CVE Explorer