# Aio-Libs Aiohttp vulnerabilities Source: https://junglewise.ai/threats/technologies/aio-libs-aiohttp Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 12 November 2026, 23:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/aio-libs-aiohttp.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 11 vulnerabilities in Aio-Libs Aiohttp: 1 in the last 7 days and 9 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-123817, was published on 9 November 2026. 8 vulnerabilities in the last four weeks, up from none in the four before. ## Counts - Last 7 days: 1 - Last 30 days: 9 - Last 90 days: 9 - All time: 11 (1 critical, 0 exploited in the wild) ## About Aio-Libs Aiohttp Python asynchronous HTTP client/server library for web applications. ## Latest Aio-Libs Aiohttp vulnerabilities - [CVE-2026-123817: AIOHTTP WebSocket memory exhaustion via fragmented frames](https://junglewise.ai/threats/cve-2026-123817-aiohttp-is-an-asynchronous-http-client-server-framework-for) (info, published 9 Nov 2026) - [CVE-2026-111750: aiohttp HTTP request smuggling in pure Python parser](https://junglewise.ai/threats/cve-2026-111750-aiohttp-is-an-asynchronous-http-client-server-framework-for) (medium, CVSS 4, published 19 Oct 2026) - [CVE-2026-111749: aiohttp host-only cookie scope bypass in subdomain handling](https://junglewise.ai/threats/cve-2026-111749-aiohttp-is-an-asynchronous-http-client-server-framework-for) (medium, CVSS 4, published 19 Oct 2026) - [CVE-2026-111748: aiohttp Request scheme manipulation in absolute-form requests](https://junglewise.ai/threats/cve-2026-111748-aiohttp-is-an-asynchronous-http-client-server-framework-for) (medium, CVSS 4, published 19 Oct 2026) - [CVE-2026-111066: AIOHTTP multipart request file descriptor exhaustion](https://junglewise.ai/threats/cve-2026-111066-aiohttp-is-an-asynchronous-http-client-server-framework-for) (high, CVSS 4, published 19 Oct 2026) - [CVE-2026-111065: aiohttp cookie Max-Age integer overflow causes connection pool exhaustion](https://junglewise.ai/threats/cve-2026-111065-aiohttp-is-an-asynchronous-http-client-server-framework-for) (medium, CVSS 4, published 19 Oct 2026) - [CVE-2026-111064: aiohttp keepalive timeout enforcement bypass](https://junglewise.ai/threats/cve-2026-111064-aiohttp-is-an-asynchronous-http-client-server-framework-for) (high, CVSS 4, published 19 Oct 2026) - [CVE-2026-111063: AIOHTTP secure cookie enforcement bypass](https://junglewise.ai/threats/cve-2026-111063-aiohttp-is-an-asynchronous-http-client-server-framework-for) (low, published 19 Oct 2026) - [aiohttp resource exhaustion via unbounded memory/CPU use](https://junglewise.ai/threats/aiohttp-multiple-instances-of-excessive-or-unbounded-memory-cpu-use-a4cd3374) (high, CVSS 4, published 19 Oct 2026) - [CVE-2026-34520: aio-libs aiohttp header injection in llhttp C parser](https://junglewise.ai/threats/cve-2026-34520-aio-libs-aiohttp-header-injection-in-llhttp-c-parser) (critical, CVSS 9.1, published 1 Apr 2026) - [CVE-2026-34514: aiohttp CRLF injection in multipart content type header](https://junglewise.ai/threats/cve-2026-34514-aiohttp-crlf-injection-in-multipart-content-type-header) (medium, CVSS 5.3, published 1 Apr 2026) ## Most severe Aio-Libs Aiohttp vulnerabilities - [CVE-2026-34520: aio-libs aiohttp header injection in llhttp C parser](https://junglewise.ai/threats/cve-2026-34520-aio-libs-aiohttp-header-injection-in-llhttp-c-parser) (critical, CVSS 9.1, published 1 Apr 2026) - [CVE-2026-111064: aiohttp keepalive timeout enforcement bypass](https://junglewise.ai/threats/cve-2026-111064-aiohttp-is-an-asynchronous-http-client-server-framework-for) (high, CVSS 4, published 19 Oct 2026) - [CVE-2026-111066: AIOHTTP multipart request file descriptor exhaustion](https://junglewise.ai/threats/cve-2026-111066-aiohttp-is-an-asynchronous-http-client-server-framework-for) (high, CVSS 4, published 19 Oct 2026) - [aiohttp resource exhaustion via unbounded memory/CPU use](https://junglewise.ai/threats/aiohttp-multiple-instances-of-excessive-or-unbounded-memory-cpu-use-a4cd3374) (high, CVSS 4, published 19 Oct 2026) - [CVE-2026-34514: aiohttp CRLF injection in multipart content type header](https://junglewise.ai/threats/cve-2026-34514-aiohttp-crlf-injection-in-multipart-content-type-header) (medium, CVSS 5.3, published 1 Apr 2026) - [CVE-2026-111748: aiohttp Request scheme manipulation in absolute-form requests](https://junglewise.ai/threats/cve-2026-111748-aiohttp-is-an-asynchronous-http-client-server-framework-for) (medium, CVSS 4, published 19 Oct 2026) - [CVE-2026-111065: aiohttp cookie Max-Age integer overflow causes connection pool exhaustion](https://junglewise.ai/threats/cve-2026-111065-aiohttp-is-an-asynchronous-http-client-server-framework-for) (medium, CVSS 4, published 19 Oct 2026) - [CVE-2026-111750: aiohttp HTTP request smuggling in pure Python parser](https://junglewise.ai/threats/cve-2026-111750-aiohttp-is-an-asynchronous-http-client-server-framework-for) (medium, CVSS 4, published 19 Oct 2026) - [CVE-2026-111749: aiohttp host-only cookie scope bypass in subdomain handling](https://junglewise.ai/threats/cve-2026-111749-aiohttp-is-an-asynchronous-http-client-server-framework-for) (medium, CVSS 4, published 19 Oct 2026) - [CVE-2026-111063: AIOHTTP secure cookie enforcement bypass](https://junglewise.ai/threats/cve-2026-111063-aiohttp-is-an-asynchronous-http-client-server-framework-for) (low, published 19 Oct 2026) ## Vulnerabilities per week 8 vulnerabilities in the last four weeks, up from none in the four before. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 8 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 1 | 0 | 0 | ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Aio-Libs Aiohttp vulnerabilities", https://junglewise.ai/threats/technologies/aio-libs-aiohttp, 12 November 2026.