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CVE-2026-107283— AsyncHttpClient: Digest authentication cnonce generated with a non-cryptographic random source

Quick assessment

Affected

AsyncHttpClient async-http-client

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.

AsyncHttpClient（AHC）库允许 Java 应用程序轻松地执行 HTTP 请求并异步处理 HTTP 响应。在版本 3.0.12 和 2.16.1 之前，Realm.Builder 使用 ThreadLocalRandom 而非密码学安全的随机源来生成 HTTP Digest 客户端 nonce（cnonce）。Digest 机制依赖不可预测的 cnonce 来抵御选择明文攻击和凭证预计算攻击，因此，能够推断出随机数生成器状态的攻击者可以削弱身份验证交换的安全性保护。该问题已在版本 3.0.12 和 2

CVSS 3.7 · Low Updated Oct 08, 2026

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Vulnerability Information

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Vulnerability Title

AsyncHttpClient: Digest authentication cnonce generated with a non-cryptographic random source

Source: CVE Program / CVE List V5

Vulnerability Description

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.12 and 2.16.1, Realm.Builder generates the HTTP Digest client nonce with ThreadLocalRandom rather than a cryptographically secure random source. Digest relies on an unpredictable cnonce to resist chosen-plaintext and credential precomputation attacks, so an observer able to infer generator state can reduce the protection of the authentication exchange. This issue is fixed in versions 3.0.12 and 2.16.1.

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

使用具有密码学弱点缺陷的PRNG

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
AsyncHttpClient	async-http-client	>= 3.0.0, < 3.0.12	-

II. Public POCs for CVE-2026-107283

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III. Intelligence Information for CVE-2026-107283

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Other References for CVE-2026-107283 (5)

https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-mfj3-87qq-382v x_refsource_CONFIRM
https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.12 x_refsource_MISC
https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1 x_refsource_MISC
https://github.com/AsyncHttpClient/async-http-client/commit/dca2d90db87f0144ea893a6858dca13c426d06b6 x_refsource_MISC
https://github.com/AsyncHttpClient/async-http-client/commit/e1f5fc88fe211d3f64032c33b91093ba3d5e793d x_refsource_MISC

https://www.cve.org/CVERecord?id=CVE-2026-107283

Same Patch Batch · AsyncHttpClient · 2026-10-07 · 13 CVEs total

CVE-2026-107282	9.4 CRITICAL	AsyncHttpClient: Replay to a different host sends the original host request and credential
CVE-2026-107279	8.8 HIGH	AsyncHttpClient: Digest mutual authentication is switched off by a peer offering qop=auth-
CVE-2026-107231	8.7 HIGH	AsyncHttpClient: Digest challenge without a usable nonce downgrades to Basic and sends the
CVE-2026-107281	7.6 HIGH	AsyncHttpClient: Connection pool key omits the authenticated principal, so an NTLM or Nego
CVE-2026-107227	7.5 HIGH	AsyncHttpClient: Unbounded WebSocket permessage-deflate decompression enables a decompress
CVE-2026-107232	7.5 HIGH	AsyncHttpClient: Origin credentials sent in cleartext to a proxy that rejects the CONNECT
CVE-2026-107230	7.4 HIGH	AsyncHttpClient: Pooled connections can still be shared across NTLM, Negotiate and proxy l
CVE-2026-107280	6.9 MEDIUM	AsyncHttpClient: Cookie Domain attribute is not checked against the public suffix list, so
CVE-2026-107228	6.8 MEDIUM	AsyncHttpClient CookieStore Silently Overrides Caller's Explicit Cookie Header via setHead
CVE-2026-107285	5.9 MEDIUM	AsyncHttpClient: WebSocket proxy credentials sent to the origin server over a CONNECT tunn
CVE-2026-107229	4.0 MEDIUM	AsyncHttpClient: Incomplete origin checks in the default cookie store allow cookie tossing
CVE-2026-107284	3.7 LOW	AsyncHttpClient: WebSocket handshake continues after a failed Sec-WebSocket-Accept check

IV. Related Vulnerabilities

Same product: async-http-client

Same vendor: AsyncHttpClient

Same weakness: CWE-338

V. Comments for CVE-2026-107283

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

CVE-2026-107283— AsyncHttpClient: Digest authentication cnonce generated with a non-cryptographic random source

Quick assessment

I. Basic Information for CVE-2026-107283

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-107283

III. Intelligence Information for CVE-2026-107283

Other References for CVE-2026-107283 (5)

Same Patch Batch · AsyncHttpClient · 2026-10-07 · 13 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-107283

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