CVE-2026-72761
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
Summary
The webhook URL validator in website/notifications/webhooks.py uses
ip.is_global to reject non-public addresses after DNS resolution. IPv6
transition addresses (NAT64 64:ff9b::/96, 6to4 2002::/16, Teredo
2001:0000::/32) are classified as globally routable by IANA, so is_global
returns True even when the embedded IPv4 targets a private, loopback, or
cloud metadata destination. An attacker can register a webhook pointing at a
hostname that resolves to a transition address to bypass the SSRF guard and
exfiltrate vulnerability data to an internal endpoint.
The vulnerability was introduced on a non-release version. The fix was already done on HEAD. It only affects
organisation running the HEAD.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| vulnerability-lookup | vulnerability-lookup | 0 <= 5.5.0 | unaffected |
Weaknesses
- CWE-918: CWE-918 Server-Side Request Forgery (SSRF)
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
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