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CVE-2026-55791

Craft CMS is a content management system (CMS). Versions 4.0.0-RC1 and above, prior to 4.18.0 and 5.0.0-RC1, and above, prior to 5.10.0, are vulnerable to Server-Side Request Forgery (SSRF) and Arbitrary JavaScript Injection through the /actions/app/resource-js endpoint. By exploiting the default permissive trustedHosts configuration, an attacker can poison the Host or X-Forwarded-Host header to manipulate the application’s $baseUrl. This bypasses the endpoint’s internal URL validation, forcing
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3bf155e79dd96f499289f71c6dd3119c68eed78aa2d30b2dda7899928b107e08
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e4a7d89de16783711d77b018d191366d7b61bb29a22e676c6aa9230f2c6e6359 · sha256:28348103f76c3b88… · /containers/cna/problemTypes/2/descriptions/0

{"cweId":"CWE-644","description":"CWE-644: Improper Neutralization of HTTP Headers for Scripting Syntax","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e4a7d89de16783711d77b018d191366d7b61bb29a22e676c6aa9230f2c6e6359 · sha256:28348103f76c3b88… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e4a7d89de16783711d77b018d191366d7b61bb29a22e676c6aa9230f2c6e6359 · sha256:28348103f76c3b88… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"cms","vendor":"craftcms","versions":[{"status":"affected","version":">= 5.0.0-RC1, < 5.10.0"},{"status":"affected","version":">= 4.0.0-RC1, < 4.18.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e4a7d89de16783711d77b018d191366d7b61bb29a22e676c6aa9230f2c6e6359 · sha256:28348103f76c3b88… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","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:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e4a7d89de16783711d77b018d191366d7b61bb29a22e676c6aa9230f2c6e6359 · sha256:28348103f76c3b88… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

3 source assertions
{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e4a7d89de16783711d77b018d191366d7b61bb29a22e676c6aa9230f2c6e6359 · sha256:28348103f76c3b88… · /containers/cna/problemTypes/2/descriptions/0
{"cweId":"CWE-644","description":"CWE-644: Improper Neutralization of HTTP Headers for Scripting Syntax","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e4a7d89de16783711d77b018d191366d7b61bb29a22e676c6aa9230f2c6e6359 · sha256:28348103f76c3b88… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e4a7d89de16783711d77b018d191366d7b61bb29a22e676c6aa9230f2c6e6359 · sha256:28348103f76c3b88… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/craftcms/cms/pull/18559","tags":["x_refsource_MISC"],"url":"https://github.com/craftcms/cms/pull/18559"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e4a7d89de16783711d77b018d191366d7b61bb29a22e676c6aa9230f2c6e6359 · sha256:28348103f76c3b88… · /containers/cna/references/1
{"name":"https://github.com/craftcms/cms/security/advisories/GHSA-c55v-343g-5xff","tags":["x_refsource_CONFIRM"],"url":"https://github.com/craftcms/cms/security/advisories/GHSA-c55v-343g-5xff"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e4a7d89de16783711d77b018d191366d7b61bb29a22e676c6aa9230f2c6e6359 · sha256:28348103f76c3b88… · /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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