CVE-2020-7658 json
meinheld vulnerable to HTTP Request Smuggling
published 2020-05-22 6 y ago modified 2026-06-17 4 mo ago also GHSA-63h2-9cc8-fc7m , PYSEC-2020-239 , EUVD-2020-0109
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 52%
- public exploits
- 0
- none known
Summary
meinheld prior to 1.0.2 is vulnerable to HTTP Request Smuggling. HTTP pipelining issues and request smuggling attacks might be possible due to incorrect Content-Length and Transfer encoding header parsing.
Patch / fix
- pypi meinheld 1.0.2
- meinheld meinheld 1.0.2
Exploit prediction
0.69% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | meinheld | <1.0.2 |
1.0.2 |
Affected products
- n/a meinheld
Classification
- Weakness
-
- CWE-444 Inconsistent Interpretation of HTTP Requests
References
-
snyk.io
/vuln/SNYK-PYTHON-MEINHELD-569140
web, patch, release-notes, third-party-advisory, advisory
-
github.com
/mopemope/meinheld/commit/0cfa70b2cd3800f1e4beeaef5421b156d90f0e09
web
-
github.com
/mopemope/meinheld/commit/3bc3e7ccd534277af955c0c92981d0aa033929a7
web
-
github.com
/mopemope/meinheld/commit/4155876bfd3e8fc4adad4aaa59ec3f1cefa1d2d1
web
- github.com /mopemope/meinheld/blob/master/CHANGES.rst%2C
-
nvd.nist.gov
/vuln/detail/CVE-2020-7658
advisory
-
github.com
/mopemope/meinheld/issues/111
web
-
github.com
/mopemope/meinheld
package
-
github.com
/mopemope/meinheld/blob/master/CHANGES.rst
web
-
github.com
/pypa/advisory-database/tree/main/vulns/meinheld/PYSEC-2020-239.yaml
web
-
github.com
/mopemope/meinheld/blob/master/CHANGES.rst,
web
-
github.com
/advisories/GHSA-63h2-9cc8-fc7m
advisory
Sources
- CVE List CVE-2020-7658
- GitHub Advisory GHSA-63h2-9cc8-fc7m
- NVD CVE-2020-7658
- OSV PYSEC-2020-239
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.