{"id":"CVE-2026-102360","title":"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","summary":"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 …","severity":"high","cvss":8.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","cwe":["CWE-125"],"vendor":"dmonad","product":"lib0","affected":["lib0 <= 0.2.1-0.2.117","lib0 <= 1.0.0-rc.32"],"published":"2026-09-29","updated":"2026-09-29","sourceUpdated":"2026-09-29T14:17:20.117","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102360","references":[{"url":"https://github.com/dmonad/lib0/commit/425f28dc82c8df1b6f7e1ab20ea1a0a15a3c355f","label":"security-advisories@github.com"},{"url":"https://github.com/dmonad/lib0/commit/c4c9db0b41346a33aff31a51f1f09c3a17757f10","label":"security-advisories@github.com"},{"url":"https://github.com/dmonad/lib0/security/advisories/GHSA-r5c8-rf4w-qrq8","label":"security-advisories@github.com"},{"url":"https://github.com/dmonad/lib0/security/advisories/GHSA-r5c8-rf4w-qrq8","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-29T13:54:57.965828Z"},"ingestedAt":"2026-09-29T13:34:31.684Z","slug":"CVE-2026-102360","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":59,"depthScoreParts":{"impact":47.3,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":212705,"id":"CVE-2026-102360","ts":1790692646339,"field":"exploit_available","old":"false","new":"true"}]}