CVE-2026-71271
8.5 HIGHpublic exploit availablePublished 2026-08-05 · Updated 2026-08-10
AI risk analysis
- Summary
- The flaw lies in the webhook URL validation function, where the IP validation is incomplete, potentially allowing external IPs to be accepted, which could lead to unauthorized access or misuse.
- Exploitability
- Exploitation is moderately hard as it requires crafting a request with a non-reserved IP that bypasses the validation, but preconditions include access to the webhook endpoint.
- Blast radius
- If exploited, this could result in unauthorized access to internal systems or data, impacting the integrity and confidentiality of the affected network.
- Detection
- No reliable host or network indicator is derivable from the published description.
- Prioritized remediation
- Upgrade to the fixed version 2.590 or later, which addresses the incomplete IP validation issue.
auth-bypasswebinternal-network
Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.
NVD 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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Weaknesses
CWE-918
Public exploit & PoC references
References
Data: NVD (public domain). Analysis: local $0 model. Defensive use only.