CVE-2026-70634: TimescaleDB through 2.29.1, fixed in commit 517c13e, contains an out-of-bounds read in the Dictionary compress

Q: How do I fix CVE-2026-70634?

timescaledb: upgrade to newer than 2.29.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-70634 being exploited?

CVE-2026-70634 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-70634 affect?

CVE-2026-70634 affects timescaledb. Severity is high (CVSS 8.1). 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

Routine

HIGH 8.1UPGRADE

CVE-2026-70634 is a high-severity flaw (CVSS 8.1) affecting timescaledb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 stor

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-125, CWE-129
Published	2026-08-06
Last modified	2026-10-24

Publisher (CNA): VulnCheck · Vendor: timescale

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-06 22:18 UTCPublished CVE record published
2026-10-24 15:10 UTCUpdated Record last modified

timescale timescaledb UPGRADE

Affected: <= 2.29.1

Fixed in: newer than 2.29.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy timescaledb || rpm -q timescaledb || timescaledb --version

2. UPGRADE to newer than 2.29.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade timescaledb

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade timescaledb

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora ELN · ntpd-rs · FIXED · 1.7.2-3.eln159 · FEDORA-2026-57e4a99310 · source

sudo dnf upgrade --advisory=FEDORA-2026-57e4a99310

Fedora 46 · moby-engine · FIXED · 29.9.2-2.fc46 · FEDORA-2026-4856be87b3 · source

sudo dnf upgrade --advisory=FEDORA-2026-4856be87b3

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-70634?

timescaledb: upgrade to newer than 2.29.1. Exact commands for each OS are on this page.

Is CVE-2026-70634 being exploited?

CVE-2026-70634 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-70634 affect?

CVE-2026-70634 affects timescaledb. Severity is high (CVSS 8.1). 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

How urgent is CVE-2026-70634?

Priority 39/100. High severity

Related CVEs

CVE-2026-70635 HIGH 7.1 UPGRADE TimescaleDB through 2.29.1, fixed in commit 517c13e, contains an out-of-bounds read vulnerability that allows
CVE-2026-70633 MEDIUM 6.5 UPGRADE TimescaleDB through 2.29.1, fixed in commit 517c13e, contains an out-of-bounds read vulnerability in the Goril

References

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