Backend memory disclosure via unchecked dictionary index
Published Aug 6, 2026 · Updated Aug 6, 2026
Out-of-bounds read in TimescaleDB through 2.29.1 allows remote authenticated users to disclose PostgreSQL backend memory. The reverse Dictionary iterator treats an assertion as index validation, so release builds use an unchecked Simple8b value as the Datum offset. DML access to a physical compressed relation is required to store crafted data and return memory, including shared-buffer contents, through a reverse scan.
Summary
What happened
Out-of-bounds read in TimescaleDB through 2.29.1 allows remote authenticated users to disclose PostgreSQL backend memory. The reverse Dictionary iterator treats an assertion as index validation, so release builds use an unchecked Simple8b value as the Datum offset. DML access to a physical compressed relation is required to store crafted data and return memory, including shared-buffer contents, through a reverse scan.
The record
- CVE
- CVE-2026-70634
- Published
- Aug 6, 2026
- Updated
- Aug 6, 2026
- Vendor
- Timescale, Inc.
- Product
- TimescaleDB
- Classifications
- CWE-129, CWE-125
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 6, 2026CVE publishedPublication date reported by the CVE source.
- Aug 6, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=2.29.1
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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