CyberSecBulletin
CVE-2026-29924NVD status: Analyzed

Grav: Improper Restriction of XML External Entity Reference

Published Updated By the CyberSecBulletin desk

CVE-2026-29924 is a high-severity improper restriction of XML external entity reference vulnerability in Grav, with a CVSS 3.1 base score of 7.6 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists version 1.8.0 as the first without the flaw, so updating Grav to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.34% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Grav to 1.8.0 or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
GravGravbefore 1.8.01.8.0

Version data comes from NVD's product matching. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
LowLimited modification of data is possible.
Availability
LowPerformance or availability is reduced.

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L. Scored by CISA (ADP).

Official description

Grav CMS v1.7.x and before is vulnerable to XML External Entity (XXE) through the SVG file upload functionality in the admin panel and File Manager plugin.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Restriction of XML External Entity Reference

The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

How developers prevent this class of flaw

  • Many XML parsers and validators can be configured to disable external entity expansion.

More Improper Restriction of XML External Entity Reference vulnerabilities (CWE-611)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other references

Other vulnerabilities in Grav

All Grav vulnerabilities

Recent Improper Restriction of XML External Entity Reference vulnerabilities

Spotted an error? Tell us.