CVSS 3.0
9.8 criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2018-20060
Critical (9.8). EPSS 4.5% chance of exploitation in the next 30 days. Fixed in urllib3 1.23.
urllib3 before version 1.23 does not remove the Authorization HTTP header when following a cross-origin redirect (i.e., a redirect that differs in host, port, or scheme). This can allow for credentials in the Authorization header to be exposed to unintended hosts or transmitted in cleartext.
Severity
- EPSS
- 4.5% chance of exploitation in the next 30 days; higher than 91% of CVEs (scores of 2026-10-31)
- Published
- Modified
- Record from
- the NVD, synced
Affected
- fedoraproject:fedora
- python:urllib3
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-www2-v7xj-xrc6 | PyPI | urllib3 | <1.23 | 1.23 |
| PYSEC-2018-32 | PyPI | urllib3 | <1.23 | 1.23 |