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CVE-2026-53944

Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, when making an external request, it is possible to bypass the IP filter that ensures the request isn't going to an internal service using an IPv6 literal which maps to a private IPv4 address. This vulnerability is fixed in 6.21.1.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2dffd7a98225d21cbc512fc578aaa8e03a98fc8d6a5ab0f60c14008671c45a34
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

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

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:38a312189429c5fadb87fef4bc39b8e3909ce47ff2353191f3a6f3a8870785d8 · sha256:27cc3cc01aa1d828… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-184","description":"CWE-184: Incomplete List of Disallowed Inputs","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:38a312189429c5fadb87fef4bc39b8e3909ce47ff2353191f3a6f3a8870785d8 · sha256:27cc3cc01aa1d828… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"Ghost","vendor":"TryGhost","versions":[{"status":"affected","version":">= 6.0.9, < 6.21.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:38a312189429c5fadb87fef4bc39b8e3909ce47ff2353191f3a6f3a8870785d8 · sha256:27cc3cc01aa1d828… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.8,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:38a312189429c5fadb87fef4bc39b8e3909ce47ff2353191f3a6f3a8870785d8 · sha256:27cc3cc01aa1d828… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:38a312189429c5fadb87fef4bc39b8e3909ce47ff2353191f3a6f3a8870785d8 · sha256:27cc3cc01aa1d828… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-184","description":"CWE-184: Incomplete List of Disallowed Inputs","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:38a312189429c5fadb87fef4bc39b8e3909ce47ff2353191f3a6f3a8870785d8 · sha256:27cc3cc01aa1d828… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/TryGhost/Ghost/security/advisories/GHSA-wvp2-4qqp-4h3r","tags":["x_refsource_CONFIRM"],"url":"https://github.com/TryGhost/Ghost/security/advisories/GHSA-wvp2-4qqp-4h3r"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:38a312189429c5fadb87fef4bc39b8e3909ce47ff2353191f3a6f3a8870785d8 · sha256:27cc3cc01aa1d828… · /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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