CVE-2026-87822CWE-407

CVE-2026-87822

High · published September 9, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
51.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
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
EPSS
0.00670 · 51.4th percentile
Weakness
CWE-407 · Inefficient Algorithmic Complexity
Published
2026-09-09T19:17Z
References (5)
https://github.com/tdunning/t-digest · [email protected]https://github.com/tdunning/t-digest/blob/8d5c1523c3d46925e9b3979a8d63c0b9d004ed1c/core/src/main/java/com/tdunning/math/stats/MergingDigest.java · [email protected]https://github.com/tdunning/t-digest/blob/8d5c1523c3d46925e9b3979a8d63c0b9d004ed1c/core/src/main/java/com/tdunning/math/stats/Sort.java · [email protected]https://github.com/tdunning/t-digest/issues/229 · [email protected]https://www.vulncheck.com/advisories/t-digest-3.1-through-3.3-denial-of-service-via-nan-centroid-means-in-mergingdigest-frombytes · [email protected]
EPSS history
Timeline
  • 11 SEP 03:19Z
    EPSS moved — → 0%
    epss
  • 09 SEP 14:32Z
    t-digest 3.1 through 3.3 Denial of Service via NaN Centroid Means in MergingDigest.fromBytes
    cvelistv5