CVE-2026-87962: Tdunning T-Digest

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Tdunning T-Digest: from 3.1, up to and including 3.3

Published 2026-09-10. Last modified 2026-09-10.