critical9.1
CVE-2025-58068
Eventlet affected by HTTP request smuggling in unparsed trailers
Impact
### Impact The Eventlet WSGI parser is vulnerable to HTTP Request Smuggling due to improper handling of HTTP trailer sections. This vulnerability could enable attackers to: - Bypass front-end security controls - Launch targeted attacks against active site users - Poison web caches ### Patches Problem has been patched in eventlet 0.40.3. The patch just drops trailers. If a backend behind eventlet.wsgi proxy requires trailers, then this patch BREAKS your setup. ### Workarounds Do not use eventlet.wsgi facing untrusted clients. ### References - Patch https://github.com/eventlet/eventlet/pull/1062 - This issue is similar to https://github.com/advisories/GHSA-9548-qrrj-x5pj
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | eventlet | < 0.40.3 | 0.40.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Eventlet | Eventlet | before 0.40.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/eventlet/eventlet/commit/0bfebd1117d392559e25b4bfbfcc941754de88fb
- https://github.com/eventlet/eventlet/pull/1062
- https://github.com/eventlet/eventlet/security/advisories/GHSA-hw6f-rjfj-j7j7
- https://lists.debian.org/debian-lts-announce/2025/09/msg00003.html
- https://github.com/advisories/GHSA-hw6f-rjfj-j7j7
- https://nvd.nist.gov/vuln/detail/CVE-2025-58068