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

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-54251— netty-incubator-codec-ohttp: [OHttpServerCodec] Native Direct-Memory Leak on AEAD Decryption Failure Leads to Gateway Denial of Service

Quick assessment

Affected
netty netty-incubator-codec-ohttp
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.

netty-incubator-codec-ohttp 基于 Netty 实现了无意识 HTTP（OHTTP）网关和客户端功能。在 0.0.23.Final 版本之前，位于 中的 OHTTP 网关解密路径会在验证 AEAD 标签之前，为解密后的明文分配一个池化的直接 ByteBuf。当无效标签导致 抛出 时， 未能释放该 ByteBuf，因为其分配操作没有被 保护。因此，反复收到无效的加密请求会导致本地堆外内存泄漏，直到网关无法继续处理请求。该问题已在 0.0.23.Final 版本中修复。

CVSS 8.7 · High EPSS 0.29% · P22

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
io.netty.incubator netty-incubator-codec-ohttp < 0.0.23.Final affected
netty netty-incubator-codec-ohttp < 0.0.23.Final affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-54251

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
netty-incubator-codec-ohttp: [OHttpServerCodec] Native Direct-Memory Leak on AEAD Decryption Failure Leads to Gateway Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
netty-incubator-codec-ohttp implements Oblivious HTTP (OHTTP) gateway and client functionality using Netty. Prior to 0.0.23.Final, the OHTTP gateway decryption path in codec-ohttp/src/main/java/io/netty/incubator/codec/ohttp/OHttpRequestResponseContext.java allocates a pooled direct ByteBuf for decrypted plaintext before the AEAD tag is verified. When an invalid tag causes decryptChunk() to throw CryptoException, OHttpRequestResponseContext.decodeChunk() does not release the ByteBuf because the allocation is not guarded by try/finally. Repeated invalid encrypted requests can therefore leak native off-heap memory until the gateway is unable to continue serving requests. This issue is fixed in version 0.0.23.Final.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在生命周期中对资源的控制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
netty netty-incubator-codec-ohttp < 0.0.23.Final -
io.netty.incubator netty-incubator-codec-ohttp < 0.0.23.Final -

II. Public POCs for CVE-2026-54251

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-54251

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-54251 (1)

Vendor Advisories for CVE-2026-54251 (1)

Vendor Pages for CVE-2026-54251 (1)

IV. Related Vulnerabilities

Same product: netty-incubator-codec-ohttp
Same vendor: netty
Same weakness: CWE-664

V. Comments for CVE-2026-54251

No comments yet

Leave a comment