Loading vulnerability…
CVE-2026-42608 is an unauthenticated path traversal vulnerability in Grav's core FormFlash component. In affected releases, a form-flash session or form identifier supplied in a POST request is used when constructing temporary form-upload paths without sufficient validation as a filesystem path component. An attacker can supply traversal sequences to escape the intended temporary forms directory, create directories at an attacker-selected location under the Grav installation, and write an attacker-controlled index.yaml file. The issue affects Grav releases before 2.0.0-beta.2; the legacy 1.7 branch received the backported fix in 1.7.53.4.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An unauthenticated path traversal flaw in Grav CMS core form-upload handling. An attacker can supply directory-traversal sequences in the __unique_form_id__ POST parameter, causing temporary upload directories and uploaded files to be created outside the intended tmp/forms path. It was used to compromise Clop's Grav 1.7.43-hosted leak site.
A path traversal vulnerability in the FormFlash core component of Grav that allows an unauthenticated attacker to manipulate the session_id parameter in POST requests to traverse the filesystem, create arbitrary directories, and write attacker-controlled index.yaml files.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.