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CVE-2026-55661

Tina is a headless content management system. In versions prior to @tinacms/mdx 2.1.7 and tinacms 3.9.3, rich-text parsing and the default link/image renderers did not sanitize the url field on Slate link/image nodes. Content containing javascript: or data:text/html URLs — including case-variant, whitespace-padded, and control-character-obfuscated forms — is rendered into href/src and executes when the content is viewed. Any actor able to author rich-text content (for example a lower-privilege
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:58871132a49e51257ca3e0edd5c353fea0780b73042768cc6f4d8fdc311ab8c1
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"product":"tinacms","vendor":"tinacms","versions":[{"status":"affected","version":"< 3.9.3"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6bf35e969a290d484d3ab648427dfbbf1ad74f501f46cb5b1afe17f0d203c261 · sha256:d429d16596ab6285… · /containers/cna/affected/0

{"product":"@tinacms/mdx","vendor":"tinacms","versions":[{"status":"affected","version":"< 2.1.7"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6bf35e969a290d484d3ab648427dfbbf1ad74f501f46cb5b1afe17f0d203c261 · sha256:d429d16596ab6285… · /containers/cna/affected/1
cwe · 2 assertions

{"cweId":"CWE-87","description":"CWE-87: Improper Neutralization of Alternate XSS Syntax","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6bf35e969a290d484d3ab648427dfbbf1ad74f501f46cb5b1afe17f0d203c261 · sha256:d429d16596ab6285… · /containers/cna/problemTypes/1/descriptions/0

{"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:v2:6bf35e969a290d484d3ab648427dfbbf1ad74f501f46cb5b1afe17f0d203c261 · sha256:d429d16596ab6285… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

2 source assertions
{"product":"tinacms","vendor":"tinacms","versions":[{"status":"affected","version":"< 3.9.3"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6bf35e969a290d484d3ab648427dfbbf1ad74f501f46cb5b1afe17f0d203c261 · sha256:d429d16596ab6285… · /containers/cna/affected/0
{"product":"@tinacms/mdx","vendor":"tinacms","versions":[{"status":"affected","version":"< 2.1.7"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6bf35e969a290d484d3ab648427dfbbf1ad74f501f46cb5b1afe17f0d203c261 · sha256:d429d16596ab6285… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":4.8,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"ACTIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6bf35e969a290d484d3ab648427dfbbf1ad74f501f46cb5b1afe17f0d203c261 · sha256:d429d16596ab6285… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-87","description":"CWE-87: Improper Neutralization of Alternate XSS Syntax","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6bf35e969a290d484d3ab648427dfbbf1ad74f501f46cb5b1afe17f0d203c261 · sha256:d429d16596ab6285… · /containers/cna/problemTypes/1/descriptions/0
{"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:v2:6bf35e969a290d484d3ab648427dfbbf1ad74f501f46cb5b1afe17f0d203c261 · sha256:d429d16596ab6285… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/tinacms/tinacms/pull/7056","tags":["x_refsource_MISC"],"url":"https://github.com/tinacms/tinacms/pull/7056"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6bf35e969a290d484d3ab648427dfbbf1ad74f501f46cb5b1afe17f0d203c261 · sha256:d429d16596ab6285… · /containers/cna/references/1
{"name":"https://github.com/tinacms/tinacms/security/advisories/GHSA-2vcc-5v34-9jc8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/tinacms/tinacms/security/advisories/GHSA-2vcc-5v34-9jc8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6bf35e969a290d484d3ab648427dfbbf1ad74f501f46cb5b1afe17f0d203c261 · sha256:d429d16596ab6285… · /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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