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CVE-2026-87962— t-digest 3.1 through 3.3 Denial of Service via Unvalidated Length Fields 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版本存在输入验证错误漏洞，该漏洞源于MergingDigest.fromBytes未验证序列化数据中的长度和容量字段，攻击者可提供标头字段不匹配的特制序列化摘要，触发数组索引越界异常或负数组大小异常，导致解析线程中止，造成拒绝服务。

CVSS 7.5 · High EPSS 0.43% · P36

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-2026-87962

Vulnerability Information
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Vulnerability Title
t-digest 3.1 through 3.3 Denial of Service via Unvalidated Length Fields in MergingDigest.fromBytes
Source: CVE Program / CVE List V5
Vulnerability 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.
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
CWE-1284
Source: CVE Program / CVE List V5
Vulnerability Title
Ted Dunning t-digest 输入验证错误漏洞
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版本存在输入验证错误漏洞，该漏洞源于MergingDigest.fromBytes未验证序列化数据中的长度和容量字段，攻击者可提供标头字段不匹配的特制序列化摘要，触发数组索引越界异常或负数组大小异常，导致解析线程中止，造成拒绝服务。
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-2026-87962

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III. Intelligence Information for CVE-2026-87962

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Vendor Advisories for CVE-2026-87962 (2)

IV. Related Vulnerabilities

Same product: t-digest
Same vendor: tdunning
Same weakness: CWE-1284

V. Comments for CVE-2026-87962

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