Description
h11 is a Python implementation of HTTP/1.1. Prior to version 0.16.0, a leniency in h11's parsing of line terminators in chunked-coding message bodies can lead to request smuggling vulnerabilities under certain conditions. This issue has been patched in version 0.16.0. Since exploitation requires the combination of buggy h11 with a buggy (reverse) proxy, fixing either component is sufficient to mitigate this issue.
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| python-h11 | — | 0.14.0-1ubuntu0.24.04.1 |
References
Similar Threats
- Unknown SUSE-RU-2026:2237-1
- Unknown SUSE-SU-2025:20330-1
- Unknown SUSE-SU-2025:20331-1
- Unknown RHSA-2025:7535
- Unknown RHSA-2025:7536
Exploit Protection
Help block exploit attempts
BotEraser is designed to detect and help reduce malicious bot traffic that may target known vulnerabilities on your site.
Try BotEraser Free →No credit card required · Results in minutes
ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.