CVE-2026-58655: The bundled Grav Flex Objects plugin (getgrav/grav-plugin-flex-objects) before 1.4.0 contains a stored server-

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HIGH 8.8

CVE-2026-58655 is a high-severity flaw (CVSS 8.8) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 Gra

Why this priority

High severity
CISA SSVC: public proof of concept

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-07-15
Last modified	2026-10-24

Publisher (CNA): VulnCheck

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-07-15 12:18 UTCPublished CVE record published
2026-10-24 22:10 UTCUpdated Record last modified

Exact fixes by distribution

Fedora ELN · mingw-pcre2 · FIXED · 10.49-1.eln159 · FEDORA-2026-f41c1162af · source

sudo dnf upgrade --advisory=FEDORA-2026-f41c1162af

Fedora 46 · mingw-cfitsio · FIXED · 4.7.0-2.fc46 · FEDORA-2026-425e65a7c8 · source

sudo dnf upgrade --advisory=FEDORA-2026-425e65a7c8

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/getgrav/grav/security/advisories/GHSA-623v-m3c4-3pw8

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-58655?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-58655 being exploited?

CVE-2026-58655 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-58655 affect?

CVE-2026-58655 affects affected software. Severity is high (CVSS 8.8). 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 front

How urgent is CVE-2026-58655?

Priority 50/100. High severity; CISA SSVC: public proof of concept

References

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