CVE-2026-70635 TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Bulk Dictionary Decompression Negative Index
Authenticated attackers can cause database crashes or incorrect data via out-of-bounds read in TimescaleDB bulk dictionary decompression.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-70635?
CVE-2026-70635 is a high-severity memory corruption vulnerability in timescaledb, published on 6 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
TimescaleDB through 2.29.1, fixed in commit 517c13e, contains an out-of-bounds read vulnerability that allows authenticated attackers to cause query-result integrity failures or backend crashes by supplying a crafted Simple8b selector-11 value, which is stored in the signed int16 Arrow dictionary-index type and bypasses index validation checks in bulk text dictionary decompression. Attackers with direct DML access to a non-frozen physical compressed hypertable relation can trigger an out-of-bounds read before the base of the live offsets array through the VectorAgg single-text hashing strategy, resulting in incorrect aggregation output, backend SIGSEGV, or PostgreSQL crash recovery depending on build configuration.
Which versions are affected by CVE-2026-70635?
It affects 1 product.
Products include Timescale Timescaledb.
How do I fix CVE-2026-70635?
No fix has been published for CVE-2026-70635 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-70635 being exploited?
There is no known exploitation of CVE-2026-70635 in the wild and no public exploit code.
Other vulnerabilities in timescaledb
- CVE-2026-29089 TimescaleDB uses untrusted search path during extension upgrade
- CVE-2023-25149 TimescaleDB has incorrect access control
- CVE-2022-24128 Privilege escalation in n/a
- CVE-2026-70634 TimescaleDB 2.29.1 Out-of-Bounds Read Information Disclosure via Dictionary Compression Reverse Iterator
- CVE-2026-70633 TimescaleDB 2.29.1 Out-of-Bounds Read DoS via Gorilla Compression Reverse Iterator
Sources
Also known as GHSA-55x3-g2hr-288r.