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CVE-2026-56764— Hono - Timing Attack in basicAuth and bearerAuth Middleware

Quick assessment

Affected
Hono Hono
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.

Hono是Hono团队开源的一个用 TypeScript 编写的 Web 框架。 Hono 4.11.10之前版本存在侧信道信息泄露漏洞，该漏洞源于timingSafeEqual函数中字符串比较非恒定时间，攻击者可利用早期终止的字符串相等性检查，通过精确的时间测量推断有效凭据。

CVSS 3.7 · Low EPSS 0.30% · P20

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 2

VendorProduct Version RangeStatus
Hono Hono < 4.11.10 affected
4.11.10 unaffected
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I. Basic Information for CVE-2026-56764

Vulnerability Information
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Vulnerability Title
Hono - Timing Attack in basicAuth and bearerAuth Middleware
Source: CVE Program / CVE List V5
Vulnerability Description
Hono before 4.11.10 contains a timing attack vulnerability in the basicAuth and bearerAuth middlewares due to non-constant-time string comparison in the timingSafeEqual function. Attackers can exploit early termination of string equality checks to infer valid credentials through precise timing measurements.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A: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
Hono 侧信道信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hono是Hono团队开源的一个用 TypeScript 编写的 Web 框架。 Hono 4.11.10之前版本存在侧信道信息泄露漏洞，该漏洞源于timingSafeEqual函数中字符串比较非恒定时间，攻击者可利用早期终止的字符串相等性检查，通过精确的时间测量推断有效凭据。
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
Hono Hono 0 ~ 4.11.10 -

II. Public POCs for CVE-2026-56764

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III. Intelligence Information for CVE-2026-56764

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Vendor Advisories for CVE-2026-56764 (1)

Other References for CVE-2026-56764 (1)

IV. Related Vulnerabilities

Same product: Hono
Same vendor: Hono
Same weakness: CWE-208

V. Comments for CVE-2026-56764

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