CVE-2026-72702 json
Grav CMS before 2.0.16 Origin Validation Bypass via Referer
published 2026-08-25 2 mo ago modified 2026-10-12 27 d ago also GHSA-9ccq-2jfg-qw33 , EUVD-2026-65216
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 4%
- public exploits
- 0
- none known
Summary
Grav CMS before 2.0.16 contains an origin validation bypass in the Uri::referrer() and Pages::referrerRoute() methods, which validate the Referer header using an unanchored string prefix match (str_starts_with($referrer, $base)) with no trailing delimiter. An attacker who controls a domain that begins with the victim site's origin (e.g. https://example.com.attacker.tld) can send a request with such a Referer to be treated as same-origin, bypassing the Referer-based origin check.
Patch / fix
- packagist getgrav/grav 2.0.16
- getgrav grav 2.0.16
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
| CNA | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | getgrav/grav | <2.0.16 |
2.0.16 |
Affected products
- getgrav grav
Classification
- Weakness
-
- CWE-346 Origin Validation Error
References
-
github.com
/getgrav/grav/security/advisories/GHSA-9ccq-2jfg-qw33
vendor-advisory, web
-
vulncheck.com
/advisories/grav-cms-before-origin-validation-bypass-via-referer
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-72702
advisory
-
github.com
/getgrav/grav
package
Sources
- CVE List CVE-2026-72702
- GitHub Advisory GHSA-9ccq-2jfg-qw33
- NVD CVE-2026-72702
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.