CVE-2026-58655
Last modified
CVE-2026-58655 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The bundled Grav Flex Objects plugin (getgrav/grav-plugin-flex-objects) before 1.4.0 contains a stored server-side template injection vulnerability. When rendering dynamic collection or object titles, the plugin passes user-controlled frontmatter values (page.header.flex.collection.title or page.header.flex.object.title) to Twig's template_from_string(), causing them to be evaluated as Twig code rather than treated as text.
Description
The bundled Grav Flex Objects plugin (getgrav/grav-plugin-flex-objects) before 1.4.0 contains a stored server-side template injection vulnerability. When rendering dynamic collection or object titles, the plugin passes user-controlled frontmatter values (page.header.flex.collection.title or page.header.flex.object.title) to Twig's template_from_string(), causing them to be evaluated as Twig code rather than treated as text. This path bypasses Grav's Security::cleanDangerousTwig() sanitization. An attacker who can control the title frontmatter of a publicly reachable Flex Objects page can achieve arbitrary Twig execution and escalate to remote command execution via access to internal Grav services such as the scheduler.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| getgrav | grav | < 1.4.0 |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-58655?
How severe is CVE-2026-58655?
How do I fix CVE-2026-58655?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-58644Deserialization of untrusted data in Microsoft Office ShareP…9.8
- CVE-2026-58647Improper neutralization of input during web page generation …5.4
- CVE-2026-5865Type Confusion in V8 in Google Chrome prior to 147.0.7727.55…8.8
- CVE-2026-58652luci-app-travelmate (and the travelmate package) contain a p…7.7
- CVE-2026-58653PraisonAI before 0.1.7 fails to validate that project_id in …5.3
- CVE-2026-58654The Grav API plugin (getgrav/grav-plugin-api) 1.0.0 contains…5.3
- CVE-2026-58656Grav API plugin before v1.0.0-rc.16 accepts JWT tokens via t…8.7
- CVE-2026-58657Grav before 2.0.0 (affected through 2.0.0-rc.9 and the 2.0 b…4.8
- CVE-2026-58658GPUStack through 2.2.1, fixed in commit 4e20551, contains an…8.8
- CVE-2026-58659PyTorch Lightning through 2.6.5, fixed in commit d710d68, co…8.4
- CVE-2026-5866Use after free in Media in Google Chrome prior to 147.0.7727…8.8
- CVE-2026-58660Kanboard through 1.2.52, fixed in commit 564cc30, BoardAjaxC…8.1
Are you affected by CVE-2026-58655?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST