CVE-2026-103262
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
Tornado versions before 6.5.9 contain an unbounded memory accumulation vulnerability in CurlAsyncHTTPClient that allows remote attackers to cause denial of service by sending a compressed response. Attackers can send a gzip-encoded decompression bomb that accumulates in memory without size limits, causing the application process to be killed by out-of-memory conditions.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| tornadoweb | tornado | 0 < 6.5.9 | affected |
| tornadoweb | tornado | 6.5.9 | unaffected |
Weaknesses
- CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
References
- https://github.com/tornadoweb/tornado/security/advisories/GHSA-chx6-46f5-w4vp
- https://github.com/tornadoweb/tornado/commit/e412435febba4569c552c5c9054f1bf92bd171a9
- https://www.vulncheck.com/advisories/tornado-before-6.5.9-denial-of-service-via-curlasynchttpclient
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