meinheld prior to 1.0.2 is vulnerable to HTTP Request Smuggling
Published May 22, 2020
5.3
MEDIUMCVSS 4.0
EPSS 0.69%
Description
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.
Affected products
- Vendor n/a Product Meinheld Defaultn/a
- Version All versions prior to 1.0.2StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Meinheld | n/a |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.69% (0.00686) | 50.94th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.69% (0.00686) | 51.20th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.12% (0.00116) | 45.79th | v3 (v2023.03.01) |
| Jul 10, 2024 | 0.12% (0.00116) | 45.74th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.12% (0.00116) | 43.69th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Mar 31, 2022 | 2.56% (0.02561) | 62.63th | v2 (v2022.01.01) |
| Jan 6, 2022 | 2.74% (0.02742) | 62.72th | v1 |
| Jan 5, 2022 | 0.62% (0.00624) | 46.35th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (10)
- https://github.com/advisories/GHSA-63h2-9cc8-fc7m Advisory
- https://github.com/mopemope/meinheld/blob/master/CHANGES.rst
- https://github.com/mopemope/meinheld/blob/master/CHANGES.rst%2C x_refsource_MISC
- https://github.com/mopemope/meinheld/commit/0cfa70b2cd3800f1e4beeaef5421b156d90f0e09
- https://github.com/mopemope/meinheld/commit/3bc3e7ccd534277af955c0c92981d0aa033929a7
- https://github.com/mopemope/meinheld/commit/4155876bfd3e8fc4adad4aaa59ec3f1cefa1d2d1
- https://github.com/mopemope/meinheld/issues/111
- https://github.com/pypa/advisory-database/tree/main/vulns/meinheld/PYSEC-2020-239.yaml
- https://nvd.nist.gov/vuln/detail/CVE-2020-7658
- https://snyk.io/vuln/SNYK-PYTHON-MEINHELD-569140 x_refsource_MISCPatchRelease NotesThird Party Advisory
Change history (0)
No recorded changes yet.