CVE Explorer

CVE-2026-26028

CryptPad is an end-to-end encrypted collaborative office suite. In versions prior to 2026.2.0, the HTML sanitizer in Diffmarked.js can be bypassed due to incomplete attribute filtering on restricted tags. The sanitizer validates only the src attribute of <iframe>, <video>, and <audio> elements, leaving all other attributes unchecked. As a result, an attacker can inject arbitrary HTML through srcdoc, completely defeating CryptPad's intended bounce sandboxing and enabling link injection or other i

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6579e65ebabbcf464f9d0594ef2812a5eedfce4e38d55a1a7308236d95d23d7d

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-116","description":"CWE-116: Improper Encoding or Escaping of Output","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:9302aacdfe3fb13e4e7b601df374b281f8740f84446d223a0338e9a44cae177e · sha256:c8733d23f05ca605… · /containers/cna/problemTypes/0/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:v2:9302aacdfe3fb13e4e7b601df374b281f8740f84446d223a0338e9a44cae177e · sha256:c8733d23f05ca605… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"product":"cryptpad","vendor":"cryptpad","versions":[{"status":"affected","version":"< 2026.2.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:9302aacdfe3fb13e4e7b601df374b281f8740f84446d223a0338e9a44cae177e · sha256:c8733d23f05ca605… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:9302aacdfe3fb13e4e7b601df374b281f8740f84446d223a0338e9a44cae177e · sha256:c8733d23f05ca605… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-116","description":"CWE-116: Improper Encoding or Escaping of Output","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:9302aacdfe3fb13e4e7b601df374b281f8740f84446d223a0338e9a44cae177e · sha256:c8733d23f05ca605… · /containers/cna/problemTypes/0/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:v2:9302aacdfe3fb13e4e7b601df374b281f8740f84446d223a0338e9a44cae177e · sha256:c8733d23f05ca605… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/cryptpad/cryptpad/releases/tag/2026.2.0","tags":["x_refsource_MISC"],"url":"https://github.com/cryptpad/cryptpad/releases/tag/2026.2.0"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:9302aacdfe3fb13e4e7b601df374b281f8740f84446d223a0338e9a44cae177e · sha256:c8733d23f05ca605… · /containers/cna/references/1

{"name":"https://github.com/cryptpad/cryptpad/security/advisories/GHSA-g2g4-47gv-p72v","tags":["x_refsource_CONFIRM"],"url":"https://github.com/cryptpad/cryptpad/security/advisories/GHSA-g2g4-47gv-p72v"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:9302aacdfe3fb13e4e7b601df374b281f8740f84446d223a0338e9a44cae177e · sha256:c8733d23f05ca605… · /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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