CVE-2019-6802
CRLF Injection in pypiserver
CRLF Injection in pypiserver 1.2.5 and below allows attackers to set arbitrary HTTP headers and possibly conduct XSS attacks via a %0d%0a in a URI.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
CRLF Injection in pypiserver 1.2.5 and below allows attackers to set arbitrary HTTP headers and possibly conduct XSS attacks via a %0d%0a in a URI.
- Record
CVE-2019-6802- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-74, CWE-79
- Updated
- 2026-11-02
CVE List No score
CRLF Injection in pypiserver 1.2.5 and below allows attackers to set arbitrary HTTP headers and possibly conduct XSS attacks via a %0d%0a in a URI.
- Record
CVE-2019-6802- Updated
- 2026-11-02
EUVDEUVD-2019-0108 No score
CRLF Injection in pypiserver 1.2.5 and below allows attackers to set arbitrary HTTP headers and possibly conduct XSS attacks via a %0d%0a in a URI.
- Record
EUVD-2019-0108- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-mh24-7wvg-v88g
CRLF Injection in pypiserver
CRLF Injection in pypiserver 1.2.5 and below allows attackers to set arbitrary HTTP headers and possibly conduct XSS attacks via a %0d%0a in a URI.
- Record
GHSA-mh24-7wvg-v88g- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-74, CWE-79
- Updated
- 2026-11-02
OSV
CRLF Injection in pypiserver 1.2.5 and below allows attackers to set arbitrary HTTP headers and possibly conduct XSS attacks via a %0d%0a in a URI.
- Record
CVE-2019-6802- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-mh24-7wvg-v88g
CRLF Injection in pypiserver
CRLF Injection in pypiserver 1.2.5 and below allows attackers to set arbitrary HTTP headers and possibly conduct XSS attacks via a %0d%0a in a URI.
- Record
GHSA-mh24-7wvg-v88g- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-74, CWE-79
- Updated
- 2026-11-02
OSVPYSEC-2019-113 No score
CRLF Injection in pypiserver 1.2.5 and below allows attackers to set arbitrary HTTP headers and possibly conduct XSS attacks via a %0d%0a in a URI.
- Record
PYSEC-2019-113- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
pypiserverPyPI |
through 1.2.5 | 1.2.6 |
pypiserverPyPI |
before 1.2.6, plus listed versions 0.1.00.1.10.1.20.1.30.2.0 Show 38 moreShow less0.3.00.4.00.4.10.5.00.5.10.5.20.6.00.6.11.0.01.0.11.1.01.1.11.1.101.1.21.1.31.1.41.1.51.1.61.1.71.1.7-rc.11.1.81.1.8b01.1.8b11.1.91.1.9.dev01.1.9.dev11.1.9.dev21.2.01.2.0.dev11.2.0b11.2.11.2.1.dev01.2.1rc01.2.21.2.2.dev01.2.31.2.41.2.5 |
1.2.6 |
pypiserverPyPI |
before 1.2.6, plus listed versions 0.1.00.1.10.1.20.1.30.2.0 Show 38 moreShow less0.3.00.4.00.4.10.5.00.5.10.5.20.6.00.6.11.0.01.0.11.1.01.1.11.1.21.1.31.1.41.1.51.1.61.1.7-rc.11.1.71.1.8b01.1.8b11.1.81.1.9.dev01.1.9.dev11.1.9.dev21.1.91.1.101.2.0.dev11.2.0b11.2.01.2.1.dev01.2.1rc01.2.11.2.2.dev01.2.21.2.31.2.41.2.5 |
1.2.6 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Nuclei | Pypiserver <1.2.5 - Carriage Return Line Feed Injection |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, Nuclei, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-6802 is a medium vulnerability (CVSS 6.1) in Python Pypiserver, published January 25, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.80%, the 90th percentile. Fixed in pypiserver 1.2.6.
References
github.com/pypiserver/pypiserver/issues/237
nvd.nist.gov/vuln/detail/CVE-2019-6802