Vulnerability · Published Aug 5, 2026 · Assigned by TuranSec
CVE-2026-71271Memos Webhook SSRF via 0.0.0.0 Reserved-IP Bypass
High 8.5
In plain English
A high-severity server-side request forgery in memos from usememos. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Severity (CVSS 3.1)8.5High
Exploit odds (30 days)0.3%top 74.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Memos' webhook URL validation, isReservedIP (internal/webhook/validate.go), checks a candidate IP against a reservedCIDRs list that omits 0.0.0.0/8 and never calls ip.IsUnspecified — unlike the correctly implemented sibling function isInternalIP in internal/httpgetter/html_meta.go, which does.
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
References
- https://github.com/usememos/memos third-party-advisory
- https://github.com/usememos/memos/blob/main/internal/webhook/validate.go third-party-advisory