{"id":"CVE-2026-102360","state":"PUBLISHED","title":"lib0 `readUint8Array` performs an unbounded read past the end of the decoder’s view, disclosing adjacent process memory","description":"A missing bounds check in the binary decoder in lib0, versions 0.2.1-0.2.117 and earlier and 1.0.0-rc.32 and earlier, lets any unauthenticated remote peer read adjacent process memory and receive it back. `readUint8Array` never compares the wire-supplied length against the decoder's own view, so one over-long length prefix returns whatever the host process allocated next: other tenants' document content, personal data, and live bearer session tokens**, recovered in full and at will. An attacker who can supply bytes to a lib0 decoder which means any peer that can open a socket, including before authentication reads adjacent process memory and, where the consumer echoes, stores or re-serves the decoded value, receives it back. This is patched in version 0.2.118 and 1.0.0-rc.33.","publishedAt":"2026-09-29T13:11:55.735Z","updatedAt":"2026-09-29T13:55:21.424Z","severity":{"score":8.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["dmonad lib0"],"affected":[{"vendor":"dmonad","product":"lib0","versions":[{"version":"<= 0.2.1-0.2.117","status":"affected"},{"version":"<= 1.0.0-rc.32","status":"affected"}]}],"references":["https://github.com/dmonad/lib0/security/advisories/GHSA-r5c8-rf4w-qrq8","https://github.com/dmonad/lib0/commit/425f28dc82c8df1b6f7e1ab20ea1a0a15a3c355f","https://github.com/dmonad/lib0/commit/c4c9db0b41346a33aff31a51f1f09c3a17757f10"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/102xxx/CVE-2026-102360.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102360","state":"PUBLISHED","datePublished":"2026-09-29T13:11:55.735Z","dateUpdated":"2026-09-29T13:55:21.424Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-28T22:38:42.255Z"},"containers":{"cna":{"title":"lib0 `readUint8Array` performs an unbounded read past the end of the decoder’s view, disclosing adjacent process memory","descriptions":[{"lang":"en","value":"A missing bounds check in the binary decoder in lib0, versions 0.2.1-0.2.117 and earlier and 1.0.0-rc.32 and earlier, lets any unauthenticated remote peer read adjacent process memory and receive it back. `readUint8Array` never compares the wire-supplied length against the decoder's own view, so one over-long length prefix returns whatever the host process allocated next: other tenants' document content, personal data, and live bearer session tokens**, recovered in full and at will. An attacker who can supply bytes to a lib0 decoder which means any peer that can open a socket, including before authentication reads adjacent process memory and, where the consumer echoes, stores or re-serves the decoded value, receives it back. This is patched in version 0.2.118 and 1.0.0-rc.33."}],"affected":[{"vendor":"dmonad","product":"lib0","versions":[{"version":"<= 0.2.1-0.2.117","status":"affected"},{"version":"<= 1.0.0-rc.32","status":"affected"}]}],"references":[{"url":"https://github.com/dmonad/lib0/security/advisories/GHSA-r5c8-rf4w-qrq8","name":"https://github.com/dmonad/lib0/security/advisories/GHSA-r5c8-rf4w-qrq8","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/dmonad/lib0/commit/425f28dc82c8df1b6f7e1ab20ea1a0a15a3c355f","name":"https://github.com/dmonad/lib0/commit/425f28dc82c8df1b6f7e1ab20ea1a0a15a3c355f","tags":["x_refsource_MISC"]},{"url":"https://github.com/dmonad/lib0/commit/c4c9db0b41346a33aff31a51f1f09c3a17757f10","name":"https://github.com/dmonad/lib0/commit/c4c9db0b41346a33aff31a51f1f09c3a17757f10","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125: Out-of-bounds Read","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-29T13:11:55.735Z"},"source":{"advisory":"GHSA-r5c8-rf4w-qrq8","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/dmonad/lib0/security/advisories/GHSA-r5c8-rf4w-qrq8","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-29T13:54:57.965828Z","id":"CVE-2026-102360","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-29T13:55:21.424Z"}}]}}}