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CVE-2026-15432— Observable Timing Discrepancy in Tink-Java and Tink-Android ChunkedMacVerification

Quick assessment

Affected
Google Tink-Java
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.

Google Tink-Java是美国Google公司的一款Java加密库软件。 Google Tink-Java和Tink-Android 1.21.0版本及之前版本存在侧信道信息泄露漏洞，该漏洞源于使用非恒定时间比较验证标签，可能允许攻击者通过侧信道定时信息获取正确标签字节。

AI Predicted 5.9 Difficulty: Moderate EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1557.002 · ARP Cache Poisoning

Affected Version Matrix 2

VendorProduct Version RangeStatus
Google Tink-Android All releases before 1.21.0, including 1.21.0. affected
Google Tink-Java All releases before 1.21.0, including 1.21.0. affected
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I. Basic Information for CVE-2026-15432

Vulnerability Information
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Vulnerability Title
Observable Timing Discrepancy in Tink-Java and Tink-Android ChunkedMacVerification
Source: CVE Program / CVE List V5
Vulnerability Description
When verifying a mac with a ChunkedMacVerification object, Tink compares the resulting tag with non constant time comparison. This potentially allows an attacker to use timinig information as a side channel in order to get information how many bytes of a given tag match the correct tag. This in turn could allow to find a correct tag bytewise.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过时间差异性导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Google Tink-Java 侧信道信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Tink-Java是美国Google公司的一款Java加密库软件。 Google Tink-Java和Tink-Android 1.21.0版本及之前版本存在侧信道信息泄露漏洞，该漏洞源于使用非恒定时间比较验证标签，可能允许攻击者通过侧信道定时信息获取正确标签字节。
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
Google Tink-Java All releases before 1.21.0, including 1.21.0. -
Google Tink-Android All releases before 1.21.0, including 1.21.0. -

II. Public POCs for CVE-2026-15432

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III. Intelligence Information for CVE-2026-15432

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Patches & Fixes for CVE-2026-15432 (1)

Same Patch Batch · Google · 2026-07-21 · 14 CVEs total

CVE-2026-16423 Google Chrome 资源管理错误漏洞
CVE-2026-16424 Google Chrome 资源管理错误漏洞
CVE-2026-16418 Google Chrome 缓冲区错误漏洞
CVE-2026-16422 Google Chrome 输入验证错误漏洞
CVE-2026-16419 Google Chrome 安全漏洞
CVE-2026-16417 Google Chrome 异常处理不当漏洞
CVE-2026-16415 Google Chrome 输入验证错误漏洞
CVE-2026-16416 Google Chrome 数字错误漏洞
CVE-2026-16414 Google Chrome 输入验证错误漏洞
CVE-2026-16413 Google Chrome 缓冲区错误漏洞
CVE-2026-16421 Google Chrome 安全漏洞
CVE-2026-16420 Google Chrome 缓冲区错误漏洞
CVE-2026-15829 SQL Injection and Security Boundary Bypass in googleapis/mcp-toolbox

IV. Related Vulnerabilities

Same vendor: Google
Same weakness: CWE-208

V. Comments for CVE-2026-15432

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