Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-100834— http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass

Quick assessment

Affected
http4k http4k
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.

在 http4k 的摘要认证模块（org.http4k:http4k-security-digest）中，低于版本 6.48.0.0、5.42.0.0 和 4.51.0.0 的默认配置将 ServerFilters.DigestAuth 和 DigestAuthProvider 的 nonceVerifier 参数设为 { true }，这意味着所有 nonce 值均会被接受，无论其内容、有效期或是否已被使用。依赖于该默认设置的 application 在摘要认证中缺乏重放保护：攻击者若能够捕获有效的 'Autho

CVSS 5.9 · Medium EPSS 0.32% · P23
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-100834

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
http4k's Digest authentication module (org.http4k:http4k-security-digest) before versions 6.48.0.0, 5.42.0.0 and 4.51.0.0 defaults the nonceVerifier parameter of ServerFilters.DigestAuth and DigestAuthProvider to { true }, so every nonce is accepted regardless of its value, age, or prior use. Applications relying on this default have no replay protection on Digest authentication: an attacker who can capture a valid 'Authorization: Digest' response (for example by observing network traffic or reading logs) can replay it indefinitely against the same protected resource.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用捕获-重放进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
http4k http4k 0 ~ 6.48.0.0 -
http4k http4k 0 ~ 5.42.0.0 -
http4k http4k 0 ~ 4.51.0.0 -

II. Public POCs for CVE-2026-100834

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-100834

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-100834 (1)

Other References for CVE-2026-100834 (3)

Same Patch Batch · http4k · 2026-09-27 · 3 CVEs total

CVE-2026-100725 6.5 MEDIUM http4k before 6.48.0.0 Cookie Scoping Bypass via BasicCookieStorage
CVE-2026-100724 5.4 MEDIUM http4k before 6.49.0.0 Host Header Routing Bypass via reverseProxy

IV. Related Vulnerabilities

Same product: http4k
Same vendor: http4k
Same weakness: CWE-294

V. Comments for CVE-2026-100834

No comments yet

Leave a comment