tdunning t-digest up to 3.3 Serialization MergingDigest.fromBytes capacity memory corruption

Summaryinfo

A vulnerability identified as problematic has been detected in tdunning t-digest up to 3.3. This affects the function MergingDigest.fromBytes of the component Serialization. This manipulation of the argument capacity causes memory corruption. The identification of this vulnerability is CVE-2026-87962. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in tdunning t-digest up to 3.3. It has been declared as problematic. Affected by this vulnerability is the function MergingDigest.fromBytes of the component Serialization. The manipulation of the argument capacity with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. The summary by CVE is:

t-digest versions 3.1 through 3.3 contain a denial of service vulnerability in MergingDigest.fromBytes that fails to validate length and capacity fields from serialized data. Attackers can supply crafted serialized digests with mismatched header fields to trigger ArrayIndexOutOfBoundsException or NegativeArraySizeException, aborting the parsing thread.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-87962 since 09/09/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/10/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• tdunning

Name

• t-digest

Version

• 3.0
• 3.1
• 3.2
• 3.3

Website

• Product: https://github.com/tdunning/t-digest/

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