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CVE-2026-72916: Server-Side Request Forgery (SSRF)

🗓️ 10 Aug 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com

Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1, PrivateAddressCheck.private_address? in app/lib/private_address_check.rb normalized IPv4-mapped IPv6 addresses but did no...

Related
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-72916
10 Aug 202621:19
–attackerkb
circl
Circl
CVE-2026-72916
10 Aug 202623:02
–circl
cve
CVE
CVE-2026-72916
10 Aug 202621:19
–cve
cvelist
Cvelist
CVE-2026-72916 Mastodon: SSRF Protection Bypass via IPv4-compatible IPv6 Addresses
10 Aug 202621:19
–cvelist
euvd
EUVD
EUVD-2026-55839
10 Aug 202621:19
–euvd
nvd
NVD
CVE-2026-72916
10 Aug 202622:17
–nvd
osv
OSV
BIT-MASTODON-2026-72916 Mastodon: SSRF Protection Bypass via IPv4-compatible IPv6 Addresses
17 Aug 202605:46
–osv
ptsecurity
Positive Technologies
PT-2026-69985
10 Aug 202600:00
–ptsecurity
ptsecurity
Positive Technologies
PT-2026-73373
17 Aug 202600:00
–ptsecurity

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09 Sep 2026 00:00Current
CVSS 46.3
EPSS0.00359
0