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CVE-2026-70634— TimescaleDB 2.29.1 Out-of-Bounds Read Information Disclosure via Dictionary Compression Reverse Iterator

Quick assessment

Affected
timescale timescaledb
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TimescaleDB是TimescaleDB公司的一款提供时序数据高效处理的数据库扩展。 TimescaleDB 2.29.1及之前版本存在安全漏洞，该漏洞源于Dictionary压缩反向行迭代器存在越界读取，反向路径未验证解码索引，导致读取偏移攻击者可控，可能造成后端内存（包括共享缓冲池）泄露。

CVSS 8.1 · High EPSS 0.53% · P43

Affected Version Matrix 2

VendorProduct Version RangeStatus
timescale timescaledb ≤ 2.29.1 affected
517c13e7cc6afadb4a7deaa7a5a5a29065e5b5a3 unaffected
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I. Basic Information for CVE-2026-70634

Vulnerability Information
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Vulnerability Title
TimescaleDB 2.29.1 Out-of-Bounds Read Information Disclosure via Dictionary Compression Reverse Iterator
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对数组索引的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
TimescaleDB 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TimescaleDB是TimescaleDB公司的一款提供时序数据高效处理的数据库扩展。 TimescaleDB 2.29.1及之前版本存在安全漏洞，该漏洞源于Dictionary压缩反向行迭代器存在越界读取，反向路径未验证解码索引，导致读取偏移攻击者可控，可能造成后端内存（包括共享缓冲池）泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
timescale timescaledb 0 ~ 2.29.1 -

II. Public POCs for CVE-2026-70634

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7887 chars
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III. Intelligence Information for CVE-2026-70634

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Patches & Fixes for CVE-2026-70634 (2)

Vendor Advisories for CVE-2026-70634 (1)

Same Patch Batch · timescale · 2026-08-06 · 3 CVEs total

CVE-2026-70635 7.1 HIGH TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Bulk Dictionary Decompression Negative Index
CVE-2026-70633 6.5 MEDIUM TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Gorilla Compression Reverse Iterator

IV. Related Vulnerabilities

Same product: timescaledb
Same vendor: timescale
Same weakness: CWE-129

V. Comments for CVE-2026-70634

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