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VulnerabilityPublished

CVE-2026-42608: getgrav grav · Path Traversal

Affects getgrav gravSource CVE Database V5

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Public exploit available · CVSS 8.8 High : upgrade to 2.0.0-beta.2 as a priority.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 4.0 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.0.0-beta.2
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CVSS exploit maturity: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade getgrav grav to 2.0.0-beta.2.

Affected software

ProductAffectedFixed in
getgravgravAffected
  • <2.0.0-beta.2
Fixed in
  • 2.0.0-beta.2
GitHubgetgrav/gravpkg:github/getgrav/gravOther threatsAffected
  • =2.0.0-beta.2
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Grav to version 2.0.0-beta.2 or later, where this vulnerability is fixed. Since the vendor advisory confirms the fix in this version, applying this update fully mitigates the issue. No other mitigation steps are indicated.

Description

Grav is a file-based Web platform. Prior to 2.0.0-beta.2, there is a Path Traversal vulnerability within the FormFlash core component. By manipulating the session_id (passed as __form-flash-id in POST requests), an unauthenticated attacker can traverse the filesystem to create arbitrary directories and write an index.yaml file containing attacker-controlled data. This vulnerability can lead to unauthorized modification of application behavior, potential data integrity issues, and service disruption in production environments. This vulnerability is fixed in 2.0.0-beta.2.

References

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