CVE-2019-9636
No exploitation reported by the sources we read.
- Published2019-03-08
- WeaknessCWE-173
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by: Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. that are cached against a given hostname). The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.7, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.3, v3.7.3rc1, v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.
Timeline
dates in UTC- 2019-03-0821:29CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-9636?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-9636?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 12.4 | = 12.04 | no fix published | NVD |
| 14.4 | = 14.04 | no fix published | NVD |
| 16.4 | = 16.04 | no fix published | NVD |
| 18.4 | = 18.04 | no fix published | NVD |
| 19.4 | = 19.04 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 3.7 | ≥ 3.7.0, < 3.7.3 | 3.7.3 | NVD |
| 3.6 | ≥ 3.6.0, < 3.6.9 | 3.6.9 | NVD |
| 3.5 | ≥ 3.5.0, < 3.5.7 | 3.5.7 | NVD |
| 3.x | ≥ 3.0.0, < 3.4.10 | 3.4.10 | NVD |
| 2.7 | ≥ 2.7.0, < 2.7.17 | 2.7.17 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 7.5 | = 7.5 | no fix published | NVD |
| 8.1 | = 8.1 | no fix published | NVD |
| 8.2 | = 8.2 | no fix published | NVD |
| 8.4 | = 8.4 | no fix published | NVD |
| 8.6 | = 8.6 | no fix published | NVD |
13 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
Advisories and patches
- bugs.python.orgPatch · Vendor Advisory
- github.comPatch
- python-security.readthedocs.ioPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2019-03-08
- Last Modified
- 2026-10-14
- NVD status
- Modified
Frequently asked questions
What is CVE-2019-9636?
Is CVE-2019-9636 actively exploited?
What is the CVSS score for CVE-2019-9636?
Hear about the next vulnerability in your software
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
No credit card required · No monthly cap on website lookups · 250 API requests/month
Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
- Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.
Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.