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CVE-2026-42608

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 disrupt
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8faf0ee2ee8391be994b6f48e8f495360dcea0162c7cb9c7ae26f5af92dcb2da
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"grav","vendor":"getgrav","versions":[{"status":"affected","version":"< 2.0.0-beta.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9d5e53db4f76fa4225d3f583feabf6372144b35508402275e2a3d0ec9f024b2a · sha256:cfea65ad43495884… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.8,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9d5e53db4f76fa4225d3f583feabf6372144b35508402275e2a3d0ec9f024b2a · sha256:cfea65ad43495884… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9d5e53db4f76fa4225d3f583feabf6372144b35508402275e2a3d0ec9f024b2a · sha256:cfea65ad43495884… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/getgrav/grav/security/advisories/GHSA-hmcx-ch82-3fv2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9d5e53db4f76fa4225d3f583feabf6372144b35508402275e2a3d0ec9f024b2a · sha256:cfea65ad43495884… · /containers/adp/0/references/0
{"name":"https://github.com/getgrav/grav/security/advisories/GHSA-hmcx-ch82-3fv2","tags":["x_refsource_CONFIRM"],"url":"https://github.com/getgrav/grav/security/advisories/GHSA-hmcx-ch82-3fv2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9d5e53db4f76fa4225d3f583feabf6372144b35508402275e2a3d0ec9f024b2a · sha256:cfea65ad43495884… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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