CVE-2026-89046 zstd-jni 1.5.5-6 through 1.5.7-13 Out-of-Bounds Read via Negative Offset
Attackers can trigger out-of-bounds reads in zstd-jni by supplying negative offsets, leading to information disclosure or JVM crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-89046?
CVE-2026-89046 is a high-severity vulnerability in luben zstd-jni, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
zstd-jni versions 1.5.5-6 through 1.5.7-13 contain an out-of-bounds read vulnerability in Zstd.getFrameContentSize that fails to validate negative srcPosition arguments. Attackers can supply negative offset values that bypass bounds checks and reach the native frame-header parser, causing out-of-bounds memory reads that lead to information disclosure or JVM crashes.
Weakness: CWE-125
Which versions are affected by CVE-2026-89046?
How do I fix CVE-2026-89046?
Upgrade to a fixed version.
Is CVE-2026-89046 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89046 exists.
Sources
Also known as CLEANSTART-2026-DU71733, CLEANSTART-2026-HC93535, CLEANSTART-2026-JW02170, CLEANSTART-2026-LX98004, CLEANSTART-2026-QD39247, CLEANSTART-2026-TJ31948 and 4 more.