CVE-2026-91992
Tornado before 6.5.7 Credential Leak via Handle Reuse
- State
- Published
- Severity
- 8.2 High
- Published
- Sep 15, 2026
- Updated
- Sep 17, 2026
- Reserved
- Sep 15, 2026
Description
Tornado before 6.5.7 contains a credential leak vulnerability in CurlAsyncHTTPClient where pycurl handles are reused across requests without proper state clearing. Attackers can obtain sensitive credentials by issuing requests through the same client instance, allowing TLS certificates or proxy authentication to persist across unintended requests.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.2 High | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.9 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Affected Products
| Product | Versions |
|---|---|
tornadotornadoweb |
|
References
- GitHub Security Advisory (GHSA-pw6j-qg29-8w7f)vendor-advisory
- VulnCheck Advisory: Tornado before 6.5.7 Credential Leak via Handle Reusethird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.