CVE Explorer
CVE-2026-27898
Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Prior to version 1.35.4, an authenticated regular user can specify another user’s cipher_id and call "PUT /api/ciphers/{id}/partial" Even though the standard retrieval API correctly denies access to that cipher, the partial update endpoint returns 200 OK and exposes cipherDetails (including name, notes, data, secureNote, etc.). This issue has been patched in version 1.35.4.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"vaultwarden","vendor":"dani-garcia","versions":[{"status":"affected","version":"< 1.35.4"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:c8e3a2927c89c380ba19dde03f505b6523f94fbbcbf4e2834bf9e38149f6dba1 · sha256:ae940509dc2b077d… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:c8e3a2927c89c380ba19dde03f505b6523f94fbbcbf4e2834bf9e38149f6dba1 · sha256:ae940509dc2b077d… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:c8e3a2927c89c380ba19dde03f505b6523f94fbbcbf4e2834bf9e38149f6dba1 · sha256:ae940509dc2b077d… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-w9f8-m526-h7fh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-w9f8-m526-h7fh"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c8e3a2927c89c380ba19dde03f505b6523f94fbbcbf4e2834bf9e38149f6dba1 · sha256:ae940509dc2b077d… · /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.