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CVE-2026-27477

🗓️ 25 Feb 2026 22:18:12Reported by redhat.comType 
redhatcve
 redhatcve
🔗 access.redhat.com👁 21 Views

CVE-2026-27477: Unauthenticated FASP registration may trigger internal-address requests when fasp is enabled; fixed.

Related
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-27477
24 Feb 202619:00
–attackerkb
circl
Circl
CVE-2026-27477
20 Feb 202620:55
–circl
cnnvd
CNNVD
Mastodon code issues and vulnerabilities
24 Feb 202600:00
–cnnvd
cve
CVE
CVE-2026-27477
24 Feb 202619:00
–cve
cvelist
Cvelist
CVE-2026-27477 Mastodon has SSRF via unvalidated FASP Provider base_url
24 Feb 202619:00
–cvelist
mend
Mend
CVE-2026-27477
24 Feb 202619:00
–mend
nvd
NVD
CVE-2026-27477
24 Feb 202620:27
–nvd
osv_bit
osv_bit
BIT-MASTODON-2026-27477 Mastodon has SSRF via unvalidated FASP Provider base_url
2 Mar 202608:42
–osv_bit
ptsecurity
Positive Technologies
PT-2026-21343
20 Feb 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-27477: Server-Side Request Forgery (SSRF)
24 Feb 202600:00
–rapid7

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25 Feb 2026 22:18Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.15.9
CVSS 48.2
EPSS0.0031
21