Medium severity · published Aug 25, 2026
CVE-2026-56708
Grav API Plugin before 1.0.16 SSRF via DNS Rebinding
5.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
grav · getgrav
before 1.0.16 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56708
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56708
github.com
https://github.com/getgrav/grav/security/advisories/GHSA-hq2v-cgw4-fw2w
www.vulncheck.com
https://www.vulncheck.com/advisories/grav-api-plugin-before-ssrf-via-dns-rebinding
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