What is CVE-2026-70634?

CVE-2026-70634 is a high-severity vulnerability in Timescale Timescaledb, classified under Out-of-bounds Read. CVSS score: 8.1/10. Published 2026-08-06.

How severe is CVE-2026-70634?

High severity. CVSS v3 base score is 8.1 out of 10.

Out-of-bounds Read in Timescale Timescaledb

CVE-2026-70634

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…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Affected products

Timescale Timescaledb — versions 0, 517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read
CWE-129 — Improper Validation of Array Index

References

disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-70634?: CVE-2026-70634 is a high-severity vulnerability in Timescale Timescaledb, classified under Out-of-bounds Read. CVSS score: 8.1/10. Published 2026-08-06.
How severe is CVE-2026-70634?: High severity. CVSS v3 base score is 8.1 out of 10.