CVE-2026-91992Tornado before 6.5.7 Credential Leak via Handle Reuse
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-200
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
tornadoweb tornado tornadoweb:tornado (from the name) | before 6.5.7; 6.5.7 not affected | CNA record |
References
- https://github.com/tornadoweb/tornado/security/advisories/GHSA-pw6j-qg29-8w7fvendor-advisory
- https://www.vulncheck.com/advisories/tornado-before-6.5.7-credential-leak-via-handle-reusethird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.