In Twisted Web through 19.10.0, there was an HTTP request splitting vulnerability.
Priority MEDIUM 48CWE-444Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 4 fixed, 6 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat.
Summary
In Twisted Web through 19.10.0, there was an HTTP request splitting vulnerability. When presented with a content-length and a chunked encoding header, the content-length took precedence and the remainder of the request body was interpreted as a pipelined request.
Why it matters now
EPSS 0.03289 88th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Twisted (PyPI): 20.3.0Red Hat: 1 advisoryRed Hat: 4 fixed, 6 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | Twisted (PyPI) | before 20.3.0 | 20.3.0 | Patch available | GHSA-p5xh-vx83-mxcj |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- Twisted (PyPI) Vendor— Affected before 20.3.0 Fixed in 20.3.0 Patch available GHSA-p5xh-vx83-mxcj
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:twisted:twisted:*:*:*:*:*:*:*:* | up to 19.10.0 | Vulnerable | twisted |
| cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | 31 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* | 19.10 | Vulnerable | Canonical |
- cpe:2.3:a:twisted:twisted:*:*:*:*:*:*:*:* Versions up to 19.10.0 Vulnerable ·twisted
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* Versions 19.10 Vulnerable ·Canonical
Remediation
- Fix · GHSA-p5xh-vx83-mxcj Twisted (PyPI) Fixed in 20.3.0 Advisory →
Red Hat 1 advisory
- RHSA-2020:1561 Released 2020-04-23 · Red Hat rating Importantpython-twisted-web security update
- Red Hat Enterprise Linux Client Optional (v. 7) python-twisted-web-12.1.0-7.el7_8
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) python-twisted-web-12.1.0-7.el7_8
- Red Hat Enterprise Linux Server Optional (v. 7) python-twisted-web-12.1.0-7.el7_8
- Red Hat Enterprise Linux Workstation Optional (v. 7) python-twisted-web-12.1.0-7.el7_8
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Ceph Storage 2 | Affected | No fix planned: Will not fix |
| Red Hat OpenShift Container Platform 4 | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 10 (Newton) | Affected | No fix planned: Out of support scope |
| Red Hat OpenStack Platform 13 (Queens) | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 16 (Train) | Affected | No fix planned: Will not fix |
| Red Hat Satellite 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2020:1561 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2020:1561 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2020:1561 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2020:1561 |
Not affected: 1 product
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2020-10109
- 2026-10-03 Alias added: GHSA-p5xh-vx83-mxcj
References
Advisory 9
- https://know.bishopfox.com/advisories/twisted-version-19.10.0
- FEDORA-2020-2136b020f2
- FEDORA-2020-16dc0da400
- USN-4308-2
- USN-4308-1
- GLSA-202007-24
- [debian-lts-announce] 20220219 [SECURITY] [DLA 2927-1] twisted security update
- https://nvd.nist.gov/vuln/detail/CVE-2020-10109
- https://github.com/advisories/GHSA-p5xh-vx83-mxcj
Other 10
- https://github.com/twisted/twisted/commit/4a7d22e490bb8ff836892cc99a1f54b85ccb0281
- https://github.com/pypa/advisory-database/tree/main/vulns/twisted/PYSEC-2020-260.yaml
- https://github.com/twisted/twisted
- https://github.com/twisted/twisted/blob/6ff2c40e42416c83203422ff70dfc49d2681c8e2/NEWS.rst#twisted-2030-2020-03-13
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ISMZFZBWW4EV6ETJGXAYIXN3AT7GBPL
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3NIL7VXSGJND2Q4BSXM3CFTAFU6T7D
- https://lists.fedoraproject.org/archives/list/[email protected]/message/6ISMZFZBWW4EV6ETJGXAYIXN3AT7GBPL
- https://lists.fedoraproject.org/archives/list/[email protected]/message/YW3NIL7VXSGJND2Q4BSXM3CFTAFU6T7D
- https://usn.ubuntu.com/4308-1
- https://usn.ubuntu.com/4308-2
Sources
- CVE-2020-10109 · CVE Program
- CVE-2020-10109 · NVD
- FIRST EPSS
- GHSA-p5xh-vx83-mxcj · GitHub Advisory Database · CC BY 4.0
- CVE-2020-10109 · Red Hat security data · CC BY 4.0
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