CVE-2026-71272CWE-367

CVE-2026-71272

High · published August 5, 2026

CVSS v3.1
8.5
EPSS
0%
Percentile
16.4
In the wild
Unconfirmed
What it is

Memos' webhook dispatch function safeDialContext (internal/webhook/webhook.go) resolves the target hostname via net.DefaultResolver.LookupHost and validates the resulting IPs against reserved ranges, but then dials net.JoinHostPort(host, port) using the original hostname rather than the already-validated IP address.

The record
Technical detail
CVSS v3.1
8.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00257 · 16.4th percentile
Weakness
CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition
Published
2026-08-05T17:24Z
References (2)
https://github.com/usememos/memos · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2chttps://github.com/usememos/memos/blob/main/internal/webhook/webhook.go · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
EPSS history
Timeline
  • 05 AUG 12:26Z
    Memos Webhook DNS Rebinding TOCTOU SSRF in safeDialContext()
    cvelistv5