CVE-2026-56708
Grav API Plugin before 1.0.16 SSRF via DNS Rebinding
- State
- Published
- Severity
- 6.9 Medium
- Published
- Aug 25, 2026
- Updated
- Aug 25, 2026
- Reserved
- Jun 22, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | 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 | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
Affected Products
| Product | Versions |
|---|---|
gravgetgrav |
|
References
- GitHub Security Advisory (GHSA-hq2v-cgw4-fw2w)vendor-advisory
- VulnCheck Advisory: Grav API Plugin before 1.0.16 SSRF via DNS Rebindingthird-party-advisory
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