CVE-2026-71271
Memos Webhook SSRF via 0.0.0.0 Reserved-IP Bypass
- State
- Published
- Severity
- 8.5 High
- Published
- Aug 5, 2026
- Updated
- Aug 10, 2026
- Reserved
- Aug 5, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.5 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N | TuranSec |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
memosusememos |
|
References
- https://github.com/usememos/memosthird-party-advisory
- https://github.com/usememos/memos/blob/main/internal/webhook/validate.gothird-party-advisory
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