RHLW-2026-8118B2499151DE91 Lightwell Security Advisory: httpclient5 5.6.1.rhlw-00012

Red Hat Lightwell has released org.apache.httpcomponents.client5:httpclient5 5.6.1.rhlw-00012 with a backported security fix. CVE-2026-64607: Apache HttpComponents Client: Connection Leak on Content-Encoding Decode Error Leads to Pool Exhaustion DoS This patched artifact is a drop-in replacement...

RHLW-2026-2A7B95611000D6B5 Lightwell Security Advisory: httpclient5 5.6.0.rhlw-00001

Red Hat Lightwell has released org.apache.httpcomponents.client5:httpclient5 5.6.0.rhlw-00001 with backported fixes for CVE-2026-40542 and CVE-2026-64607. CVE-2026-40542: Apache HttpClient: SCRAM-SHA-256 mutual authentication bypass may cause the client to accept authentication without proper...

Medium: fence-agents

Issue Overview: httplib2 is a comprehensive HTTP client library for Python. Prior to 0.32.0, httplib2 performs unbounded decompression of HTTP response bodies encoded with Content-Encoding: gzip or deflate in decompressContent in httplib2/init.py, allowing a malicious or compromised HTTP server t...

CLEANSTART-2026-XL17660 HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported `Content-Encoding` header va...

Security vulnerability affects the apache-nifi package. HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported Content-Encoding header value in the response message...

PT-2026-117911

Security vulnerability affects the apache-nifi package. HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported Content-Encoding header value in the response message...

CLEANSTART-2026-LB53139 undici's decompress interceptor decompresses response bodies according to the untrusted Content-Encoding header

CVE-2026-84890 affects multiple packages. undici's decompress interceptor decompresses response bodies according to the untrusted Content-Encoding header. See references for individual vulnerability details...

CLEANSTART-2026-LH05062 HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported `Content-Encoding` header va...

Security vulnerability affects the sonarqube package. HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported Content-Encoding header value in the response message...

Zapros has an Unbounded Content-Encoding decompression chain that allows denial of service

ImpactWho is impacted: - Any application using Zapros to make HTTP requests to untrusted servers - Applications that follow redirects to attacker-controlled hostsAttack vector: - A malicious HTTP server returns a response with many chained content encodings. When the client attempts to decode, it...

PYSEC-2026-4181 Zapros has an Unbounded Content-Encoding decompression chain that allows denial of service

Impact Who is impacted: - Any application using Zapros to make HTTP requests to untrusted servers - Applications that follow redirects to attacker-controlled hosts Attack vector: - A malicious HTTP server returns a response with many chained content encodings. When the client attempts to decode, ...

PT-2026-105923

Impact Who is impacted: - Any application using Zapros to make HTTP requests to untrusted servers - Applications that follow redirects to attacker-controlled hosts Attack vector: - A malicious HTTP server returns a response with many chained content encodings. When the client attempts to decode, ...

PT-2026-105919

Impact urllib3's streaming API is designed for the efficient handling of large HTTP responses by reading content in chunks instead of loading the entire response body into memory at once. urllib3 can decompress response bodies according to the HTTP Content-Encoding header. When streaming a...

EUVD-2026-71634

undici vulnerable to Denial of Service via unbounded decompression of compressed responses...

undici vulnerable to Denial of Service via unbounded decompression of compressed responses

Impact The interceptors.decompress interceptor decompresses HTTP response bodies according to the untrusted Content-Encoding header. The number of decompression layers is capped at 5, but the total decompressed output size is not bounded and there is no option to limit it. A malicious or faulty...

CLEANSTART-2026-CL40927 undici's decompress interceptor decompresses response bodies according to the untrusted Content-Encoding header

Security vulnerability affects the langfuse package. undici's decompress interceptor decompresses response bodies according to the untrusted Content-Encoding header...

CLEANSTART-2026-SO94492 HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported `Content-Encoding` header va...

CVE-2026-64607 affects multiple packages. HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported Content-Encoding header value in the response message. See references for individual...

PT-2026-108371

Security vulnerability affects the langfuse package. undici's decompress interceptor decompresses response bodies according to the untrusted Content-Encoding header...

openSUSE 16: httpcomponents-client / httpcomponents-client-cache / etc (openSUSE-SU-2026:21894-1)

The remote openSUSE 16 host has packages installed that are affected by a vulnerability as referenced in the openSUSE- SU-2026:21894-1 advisory. This update for httpcomponents-client fixes the following issue: - CVE-2026-64607: improper release of underlying connection back to connection manager...

Security Bulletin: HttpClient based on the classic i/o model fails to correctly release the underlying connection

Summary HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported Content-Encoding header value in the response message. Please note this defect does not affect HttpClient based on the...

org.apache.httpcomponents.client5/httpclient5: Apache HttpComponents Client: Denial of Service due to connection leak

A flaw was found in Apache HttpComponents Client, specifically in its classic input/output I/O model. When processing a response message with an invalid or unsupported Content-Encoding header, the client fails to properly release the underlying network connection. This connection leak can lead to...

GHSA-5VJJ-2R48-Q622 Zapros has an Unbounded Content-Encoding decompression chain that allows denial of service

Impact Who is impacted: - Any application using Zapros to make HTTP requests to untrusted servers - Applications that follow redirects to attacker-controlled hosts Attack vector: - A malicious HTTP server returns a response with many chained content encodings. When the client attempts to decode, ...