# CVE-2026-87962

## Summary

- **CVE ID:** CVE-2026-87962
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-1284
- **Published:** Sep 10, 2026
- **Last Modified:** Sep 10, 2026

## Description

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 (3.1)

## References

- [CNA](https://github.com/tdunning/t-digest/issues/227)
- [CNA](https://github.com/tdunning/t-digest/blob/7905f3d2ad18e7d7176811147d1316a3e23d7061/core/src/main/java/com/tdunning/math/stats/MergingDigest.java)
- [CNA](https://github.com/tdunning/t-digest)
- [CNA](https://www.vulncheck.com/advisories/t-digest-3.1-through-3.3-denial-of-service-via-unvalidated-length-fields-in-mergingdigest-frombytes)

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._