Grav CMS Cache Value FileCache.php doGet deserialization

published 2026-04-28 6 mo ago modified 2026-09-10 1 mo ago also GHSA-gwfr-jfjf-92vv , EUVD-2026-26154

cvss: 5.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits: 0; none known

A vulnerability was found in Grav CMS up to 1.7.49.5/2.0.0-beta.1. Affected by this vulnerability is the function FileCache::doGet of the file system/src/Grav/Framework/Cache/Adapter/FileCache.php of the component Cache Value Handler. The manipulation results in deserialization. The attack may be launched remotely. The attack requires a high level of complexity. The exploitation appears to be difficult. The exploit has been made public and could be used. Upgrading to version 2.0.0-beta.2 addresses this issue. The patch is identified as c66dfeb5f. The affected component should be upgraded.

Patch / fix

fixed in 2 links 2

packagist getgrav/grav 2.0.0-beta.2
Grav CMS 2.0.0-beta.2

github.com/getgrav/grav@c66dfeb commit
github.com/getgrav/grav@5a12f9b commit

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 6 mo ago (2026-04-29)

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/devsamuelsantiago/grav-cms-filecache-object-injection referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	2.3	CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
CNA	3.1	5.0	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
CNA	3.0	5.0	CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
CNA	2.0	4.6	AV:N/AC:H/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C
CNA	4.0	1.3	CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
CNA	3.1	5.0	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
CNA	2.0	4.6	AV:N/AC:H/Au:S/C:P/I:P/A:P
GitHub	3.1	5.0	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem	package	affected	fixed in
packagist	getgrav/grav	<2.0.0-beta.2	2.0.0-beta.2

Affected products

Grav CMS

Classification

Weakness

CWE-502 Deserialization of Untrusted Data
CWE-20 Improper Input Validation

References

github.com /getgrav/grav/commit/c66dfeb5f
patch, web
github.com /getgrav/grav/commit/5a12f9be8314682c8713e569e330f11805d0a663
web
github.com /devsamuelsantiago/grav-cms-filecache-object-injection
exploit, web
vuldb.com /vuln/359965
vdb-entry, technical-description, web
vuldb.com /vuln/359965/cti
signature, permissions-required, web
vuldb.com /submit/798732
third-party-advisory, web
github.com /getgrav/grav/security/advisories/GHSA-gwfr-jfjf-92vv
related, web
nvd.nist.gov /vuln/detail/CVE-2026-7317
advisory
github.com /getgrav/grav
package

Sources

CVE List CVE-2026-7317
GitHub Advisory GHSA-gwfr-jfjf-92vv
NVD CVE-2026-7317

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.

Summary