CVE-2025-58068: Eventlet affected by HTTP request smuggling in unparsed trailers
Vulnerability summary
CVE-2025-58068 is a critical (CVSS 9.1) vulnerability in eventlet. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 36.3% of scored vulnerabilities.
Not severe (CVSS 6.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Timeline
- 29-08-2025PublishedVulnerability first disclosed.
- 03-11-2025Last modifiedVulnerability information updated.
Description
Eventlet is a concurrent networking library for Python. Prior to version 0.40.3, 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, and poison web caches. This problem has been patched in Eventlet 0.40.3 by dropping trailers which is a breaking change if a backend behind eventlet.wsgi proxy requires trailers. A workaround involves not using eventlet.wsgi facing untrusted clients.
CVSS metrics
8 scores · 6 sources · 2 versions- OSV · PypiEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- OSV · UbuntuEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- NVDNIST6.3MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- OSV · Red hatEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NDiffers
- OSV · UbuntuEcosystem advisory · calculated9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- OSV · DebianEcosystem advisory · calculated9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS trend
Probability
0.42%
Chance of exploitation in the next 30 days
Percentile
36%
Versus all other CVEs
30-day change
Increase +0.03 pp
From 0.39% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Suse4 products
- python-eventlet&distro=SUSE Linux Enterprise Module for Package Hub 15 SP6< 0.26.1-150300.3.3.1
- python-eventlet&distro=SUSE Linux Enterprise Module for Package Hub 15 SP7< 0.26.1-150300.3.3.1
- python-eventlet&distro=SUSE Linux Enterprise Module for Python 3 15 SP6< 0.33.3-150400.5.6.1
- python-eventlet&distro=SUSE Linux Enterprise Module for Python 3 15 SP7< 0.33.3-150400.5.6.1
Opensuse2 products
- python-eventlet&distro=openSUSE Leap 15.6< 0.33.3-150400.5.6.1
- python-eventlet&distro=openSUSE Tumbleweed< 0.40.3-1.1
Redhat2 products
- python-eventlet< 0:0.33.1-7.el9ost
- python3-eventlet< 0:0.33.1-7.el9ost
Debian1 product
- python-eventlet< 0.26.1-7+deb11u2 | All versions (No fix recorded) | < 0.39.1-2+deb13u1 | < 0.40.1-3
Eventlet1 product
- eventlet< 0.40.3
PyPI1 product
- eventlet< 0.40.3
Ubuntu1 product
- python-eventletAll versions (No fix recorded) | < 0.39.0-0ubuntu2 | < 0.25.1-2ubuntu1.1+esm2 | < 0.30.2-5ubuntu2.2 | < 0.35.2-0ubuntu1.1
7 vendors · 12 products
References
23 links- github.com/eventlet/eventlet/security/advisories/GHSA-hw6f-rjfj-j7j7X Refsource CONFIRMWEBARTICLEREPORTVendor Advisory
- github.com/eventlet/eventlet/commit/0bfebd1117d392559e25b4bfbfcc941754de88fbX Refsource MISCWEBARTICLEREPORTPatch
- github.com/eventlet/eventletPACKAGE
Show all 23 references
- pypi.org/project/eventletPACKAGE