CVE-2026-87962 (CVSS 7.5)

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.

Is your site exposed to CVE-2026-87962?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0043

Probability of exploitation

0.36%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-1284 CWE-1284

References

Other References

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

Frequently Asked Questions

What is CVE-2026-87962? +

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 has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-87962? +

CVE-2026-87962 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0043, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-87962? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-6876

ServiceNow has remediated a sandbox escape security issue that was identified in the ServiceNow AI Platform. This security issue could …

CVE-2022-4990

** UNSUPPORTED WHEN ASSIGNED ** Improper Validation of Specified Quantity in Input in the ASUS AI Suite 3 driver allows …

CVE-2022-4989

** UNSUPPORTED WHEN ASSIGNED ** Improper Validation of Specified Quantity in Input in the ASUS AI Suite 3 driver allows …

CVE-2025-12385

Allocation of Resources Without Limits or Throttling, Improper Validation of Specified Quantity in Input vulnerability in The Qt Company Qt …

CVE-2025-9316

N-central < 2025.4 can generate sessionIDs for unauthenticated users This issue affects N-central: before 2025.4.

CVE-2026-81851

A heap-based buffer overflow vulnerability in Fireware OS's iked process allows an authenticated administrator to crash the IKE daemon (iked), …

CVE-2026-87962