CVE-2026-111066High· 7.5▾ TwilightA flaw was found in aiohttp. When processing multipart requests, the framework fails to properly limit the number of open file descriptors retained during request handling. An unauthenticated remote attacker can exploit this issue by sendi…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the vendor's CSAF advisory record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 20.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.4%
8.2 → 7.5
Last analysed / modified upstream
0.4% → 0.4%
A flaw was found in aiohttp. When processing multipart requests, the framework fails to properly limit the number of open file descriptors retained during request handling. An unauthenticated remote attacker can exploit this issue by sending specially crafted multipart requests, exhausting available file descriptors and causing a Denial of Service (DoS).
aiohttp: aiohttp: Denial of Service via file descriptor exhaustion in multipart request processing — rated Important by Red Hat. Released 2026-10-19, updated 2026-10-23.
Affected:
No fix planned:
Not affected:
Affected
Workarounds / mitigations:
The highest-value action is to enforce strict limits on multipart payload sizes and uploaded part counts in reque…
Affected packages:
aiohttp >= 2.0.0, < 3.14.4Patched in:
aiohttp 3.14.4Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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