{"affected":[{"defaultStatus":"unaffected","ecosystem":"github","packageName":"timescale/timescaledb","product":"timescaledb","source":"CNA: VulnCheck","vendor":"timescale","versions":[{"lessThanOrEqual":"2.29.1","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3","versionType":"git"}]}],"cveId":"CVE-2026-70634","cwes":["CWE-129","CWE-125"],"description":"TimescaleDB through 2.29.1, fixed in commit 517c13e, contains an out-of-bounds read in the Dictionary compression reverse row iterator (tsl/src/compression/algorithms/dictionary.c). The forward path validates the decoded index; the reverse path uses an assertion compiled out of release builds, leaving the 64-bit Simple8b index unvalidated and the read offset attacker-controlled. Attackers with DML access to a physical compressed relation can store a crafted datum and run a reverse-order scan. With a pass-by-value column type the out-of-bounds Datum is returned to the client as a normal column value, disclosing backend memory including the shared buffer pool, which SQL access control does not cover.","epss":{"date":"2026-11-08","percentile":0.45272,"score":0.00533},"exploits":[],"kev":null,"metrics":[{"score":7.2,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":8.1,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"}],"modifiedAt":1794146909970,"publishedAt":1786035238049,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking","patch"],"url":"https://github.com/timescale/timescaledb/pull/10360"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/timescale/timescaledb/commit/517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/timescaledb-out-of-bounds-read-information-disclosure-via-dictionary-compression-reverse-iterator"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/timescale/timescaledb/pull/10360"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/timescale/timescaledb/commit/517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3"}],"revision":"e36f9f2f40b93b967fea56f89ad0127bf3e669eab91f90eecf645c2a8527fc0d","sources":[{"modifiedAt":1794146909970,"name":"CNA: VulnCheck","retrievedAt":1794151318595,"url":"https://www.cve.org/CVERecord?id=CVE-2026-70634"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794151338595,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-70634"}],"ssvc":{"assessedAt":1786119120366,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"TimescaleDB 2.29.1 Out-of-Bounds Read Information Disclosure via Dictionary Compression Reverse Iterator","updatedAt":1794151338595}