CVE-2026-56708CWE-367

CVE-2026-56708

Medium · published August 25, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
19.6
In the wild
Unconfirmed
What it is

Grav API plugin before 1.0.16 contains a server-side request forgery vulnerability in webhook delivery that allows attackers to bypass hostname validation by DNS rebinding. Attackers controlling authoritative DNS for a configured webhook hostname can answer validation lookups with public addresses and delivery lookups with private addresses to reach internal network resources.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L
EPSS
0.00282 · 19.6th percentile
Weakness
CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition
Published
2026-08-25T06:16Z
References (2)
https://github.com/getgrav/grav/security/advisories/GHSA-hq2v-cgw4-fw2w · [email protected]https://www.vulncheck.com/advisories/grav-api-plugin-before-ssrf-via-dns-rebinding · [email protected]
EPSS history
Timeline
  • 26 AUG 08:15Z
    EPSS moved — → 0%
    epss
  • 25 AUG 01:30Z
    Grav API Plugin before 1.0.16 SSRF via DNS Rebinding
    cvelistv5