EUVD-2025-201419
GHSA-2xpw-w6gg-jr37
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
4Description
urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.0 and prior to 2.6.0, the Streaming API improperly handles highly compressed data. urllib3's streaming API is designed for the efficient handling of large HTTP responses by reading the content in chunks, rather than loading the entire response body into memory at once. When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP Content-Encoding header (e.g., gzip, deflate, br, or zstd). The library must read compressed data from the network and decompress it until the requested chunk size is met. Any resulting decompressed data that exceeds the requested amount is held in an internal buffer for the next read operation. The decompression logic could cause urllib3 to fully decode a small amount of highly compressed data in a single operation. This can result in excessive resource consumption (high CPU usage and massive memory allocation for the decompressed data.
Analysis
A security vulnerability in version 1.0 and (CVSS 7.5). High severity vulnerability requiring prompt remediation. Vendor patch is available.
Technical Context
Vulnerability type not specified by vendor. CVSS 7.5 indicates high severity. Affects version 1.0 and.
Affected Products
['version 1.0 and']
Remediation
Apply the vendor-supplied patch immediately.
Priority Score
Vendor Status
Ubuntu
Priority: Medium| Release | Status | Version |
|---|---|---|
| upstream | needs-triage | - |
| bionic | ignored | changes too intrusive |
| focal | ignored | changes too intrusive |
| jammy | ignored | changes too intrusive |
| trusty | ignored | changes too intrusive |
| noble | released | 2.0.7-1ubuntu0.3 |
| plucky | released | 2.3.0-2ubuntu0.2 |
| questing | released | 2.3.0-3ubuntu0.1 |
| xenial | ignored | changes too intrusive |
| Release | Status | Version |
|---|---|---|
| upstream | needs-triage | - |
| bionic | ignored | changes too intrusive |
| focal | ignored | changes too intrusive |
| jammy | ignored | changes too intrusive |
| noble | needed | - |
| questing | needed | - |
| trusty | ignored | changes too intrusive |
| xenial | ignored | changes too intrusive |
| plucky | ignored | end of life, was needed |
Debian
Bug #1122029| Release | Status | Fixed Version | Urgency |
|---|---|---|---|
| bullseye | vulnerable | 1.26.5-1~exp1 | - |
| bullseye (security) | vulnerable | 1.26.5-1~exp1+deb11u3 | - |
| bookworm | vulnerable | 1.26.12-1+deb12u1 | - |
| bookworm (security) | vulnerable | 1.26.12-1+deb12u3 | - |
| trixie (security), trixie | vulnerable | 2.3.0-3+deb13u1 | - |
| forky, sid | fixed | 2.6.3-1 | - |
| (unstable) | fixed | 2.6.3-1 | - |
Share
External POC / Exploit Code
Leaving vuln.today