CVE-2026-22815
Sean Gilligan discovered that AIOHTTP did not properly limit memory usage when processing HTTP headers and trailers. An attacker could possibly use this issue to consume excessive system resources, resulting in a denial of service. (CVE-2026-22815) It was discovered that AIOHTTP did not properly limit the size of its DNS cache. An attacker could possibly use this issue to consume excessive system resources, resulting in a denial of service. (CVE-2026-34513) Mingi Jung discovered that AIOHTTP did not properly sanitize the content_type parameter. An attacker could possibly use this issue to inject malicious HTTP headers, resulting in HTTP response splitting. (CVE-2026-34514) It was discovered that AIOHTTP did not properly limit memory usage when processing multipart headers. An attacker could possibly use this issue to consume excessive system resources, resulting in a denial of service. (CVE-2026-34516)
CSIRTS triage
- What
- AIOHTTP has multiple vulnerabilities that could lead to denial of service and HTTP response splitting.
- Who is affected
- Deployments of AIOHTTP that process HTTP headers and trailers.
- Urgency
- Remediation is urgent due to the potential for resource exhaustion and service disruption.
- Action
- Update to the latest version of AIOHTTP to mitigate these vulnerabilities.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.
Advisory coverage (1)
- unknownUSN-8591-1: AIOHTTP vulnerabilitiesubuntu · 2026-07-22
External references
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