CVE-2026-87822 t-digest 3.1 through 3.3 Denial of Service via NaN Centroid Means in MergingDigest.fromBytes
Attackers can cause denial of service by injecting NaN values into serialized t-digest data, degrading merge performance.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-87822?
CVE-2026-87822 is a high-severity denial of service vulnerability in tdunning t-digest, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
t-digest versions 3.1 through 3.3 fail to validate centroid means during deserialization in MergingDigest.fromBytes, allowing attackers to inject NaN values that bypass validation checks. Attackers can craft malicious serialized digests containing NaN centroids that degrade sorting performance from O(n log n) to O(n squared), causing severe processing delays during merge operations.
Weakness: CWE-407
Which versions are affected by CVE-2026-87822?
How do I fix CVE-2026-87822?
No fix has been published for CVE-2026-87822 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-87822 being exploited?
There is no known exploitation of CVE-2026-87822 in the wild and no public exploit code.
Sources
Also known as GHSA-32f6-mgwr-pvc4, UBUNTU-CVE-2026-87822.