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CVE-2026-87822— t-digest 3.1 through 3.3 Denial of Service via NaN Centroid Means in MergingDigest.fromBytes

Quick assessment

Affected
tdunning t-digest
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Ted Dunning t-digest是Ted Dunning个人开发者的一款支持大规模流式数据高精度分位数估计的数据结构。 Ted Dunning t-digest 3.1版本至3.3版本存在资源管理错误漏洞，该漏洞源于MergingDigest.fromBytes反序列化过程中未验证centroid均值，攻击者可注入NaN值绕过验证检查，导致排序性能下降，造成合并操作期间严重的处理延迟，形成拒绝服务。

CVSS 7.5 · High EPSS 0.67% · P52

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
tdunning t-digest 3.1≤ 3.3 affected
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I. Basic Information for CVE-2026-87822

Vulnerability Information
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Vulnerability Title
t-digest 3.1 through 3.3 Denial of Service via NaN Centroid Means in MergingDigest.fromBytes
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
Source: CVE Program / CVE List V5
Vulnerability Title
Ted Dunning t-digest 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ted Dunning t-digest是Ted Dunning个人开发者的一款支持大规模流式数据高精度分位数估计的数据结构。 Ted Dunning t-digest 3.1版本至3.3版本存在资源管理错误漏洞，该漏洞源于MergingDigest.fromBytes反序列化过程中未验证centroid均值，攻击者可注入NaN值绕过验证检查，导致排序性能下降，造成合并操作期间严重的处理延迟，形成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
tdunning t-digest 3.1 ~ 3.3 -

II. Public POCs for CVE-2026-87822

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III. Intelligence Information for CVE-2026-87822

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Vendor Advisories for CVE-2026-87822 (1)

Proof of Concept for CVE-2026-87822 (1)

Other References for CVE-2026-87822 (1)

IV. Related Vulnerabilities

Same product: t-digest
Same vendor: tdunning
Same weakness: CWE-407