PYSEC-2026-1350

Vulnerability from pysec - Published: 2026-07-07 16:03 - Updated: 2026-07-07 17:24
VLAI
Details

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
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Impacted products
Name purl
eventlet pkg:pypi/eventlet
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "eventlet",
        "purl": "pkg:pypi/eventlet"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.40.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.0",
        "0.11.0",
        "0.12.1",
        "0.13.0",
        "0.14.0",
        "0.15.2",
        "0.16.1",
        "0.17.4",
        "0.18.2",
        "0.18.3",
        "0.18.4",
        "0.19.0",
        "0.2",
        "0.20.0",
        "0.20.1",
        "0.21.0",
        "0.22.0",
        "0.22.1",
        "0.23.0",
        "0.24.0",
        "0.24.1",
        "0.25.0",
        "0.25.1",
        "0.25.2",
        "0.26.0",
        "0.26.1",
        "0.27.0",
        "0.28.0",
        "0.28.1",
        "0.29.0",
        "0.29.1",
        "0.30.0",
        "0.30.1",
        "0.30.2",
        "0.30.3",
        "0.31.0",
        "0.31.1",
        "0.32.0",
        "0.33.0",
        "0.33.1",
        "0.33.2",
        "0.33.3",
        "0.34.1",
        "0.34.2",
        "0.34.3",
        "0.35.0",
        "0.35.1",
        "0.35.2",
        "0.36.0",
        "0.36.1",
        "0.37.0",
        "0.38.0",
        "0.38.1",
        "0.38.2",
        "0.39.0",
        "0.39.1",
        "0.40.0",
        "0.40.1",
        "0.40.2",
        "0.5.3",
        "0.6.1",
        "0.7",
        "0.8",
        "0.8.16",
        "0.9.17"
      ]
    }
  ],
  "aliases": [
    "CVE-2025-58068",
    "GHSA-hw6f-rjfj-j7j7"
  ],
  "details": "### Impact\nThe Eventlet WSGI parser is vulnerable to HTTP Request Smuggling due to improper handling of HTTP trailer sections.\n\nThis vulnerability could enable attackers to:\n- Bypass front-end security controls\n- Launch targeted attacks against active site users\n- Poison web caches\n\n### Patches\nProblem has been patched in eventlet 0.40.3.\n\nThe patch just drops trailers. If a backend behind eventlet.wsgi proxy requires trailers, then this patch BREAKS your setup.\n\n### Workarounds\nDo not use eventlet.wsgi facing untrusted clients.\n\n### References\n- Patch https://github.com/eventlet/eventlet/pull/1062\n- This issue is similar to https://github.com/advisories/GHSA-9548-qrrj-x5pj",
  "id": "PYSEC-2026-1350",
  "modified": "2026-07-07T17:24:06.360154Z",
  "published": "2026-07-07T16:03:02.778128Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/eventlet/eventlet/security/advisories/GHSA-hw6f-rjfj-j7j7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-58068"
    },
    {
      "type": "WEB",
      "url": "https://github.com/eventlet/eventlet/pull/1062"
    },
    {
      "type": "WEB",
      "url": "https://github.com/eventlet/eventlet/commit/0bfebd1117d392559e25b4bfbfcc941754de88fb"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/eventlet/eventlet"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/09/msg00003.html"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/eventlet"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-hw6f-rjfj-j7j7"
    }
  ],
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Eventlet affected by HTTP request smuggling in unparsed trailers"
}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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