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CVE-2026-42554

🗓️ 11 May 2026 21:47:17Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 67 Views🌐 WEB

Fiber XSS in AutoFormat content negotiation enables HTML/JavaScript injection via Accept: text/html.

Related
Detection
Affected
Refs
Paths
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-42554
11 May 202621:47
–attackerkb
cgr
Chainguard
CVE-2026-42554 vulnerabilities
6 May 202619:17
–cgr
circl
Circl
CVE-2026-42554
25 Apr 202613:08
–circl
cnnvd
CNNVD
Fiber Cross-Site Scripting Vulnerabilities
11 May 202600:00
–cnnvd
cvelist
Cvelist
CVE-2026-42554 Fiber: XSS in AutoFormat Content Negotiation
11 May 202621:47
–cvelist
github
Github Security Blog
Fiber vulnerable to XSS in AutoFormat Content Negotiation
5 May 202620:13
–github
mend
Mend
CVE-2026-42554
11 May 202621:47
–mend
nvd
NVD
CVE-2026-42554
11 May 202623:19
–nvd
osv_cga
osv_cga
CGA-7M94-W8FX-6G5V
6 May 202615:16
–osv_cga
osv_cga
osv_cga
CGA-C84H-Q92J-6VM3
6 May 202612:06
–osv_cga
Rows per page
NVD
Vulners
Node
OR
gofiberfiberRange<2.52.12go
gofiberfiberRange3.0.0–3.1.0go
[
  {
    "vendor": "gofiber",
    "product": "fiber",
    "versions": [
      {
        "version": "< 2.52.13",
        "status": "affected"
      },
      {
        "version": ">= 3.0.0-beta.2, < 3.1.0",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
Acceptheader/Cross-Site Scripting (XSS) vulnerability in Fiber where supplying 'Accept: text/html' can cause the framework to emit raw HTML when the handler uses the AutoFormat() feature with attacker-influenced data.CWE-79

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17 Jun 2026 10:48Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.16.1
CVSS 45.3
EPSS0.00307
SSVC
67