#aio-libs: aiohttp and ecosystem

Finally, the post about collab w/ @trailofbits.bsky.social is out: blog.trailofbits.com/2026/06/22/i.... #aiohttp was one of the participating projects and got 8 security fixes out of it! #Python

@bdraco.org is at the @pycon.us sprint already. 📍 Seaside Ballroom A, third table from the door @ #PyConUS sprints venue Also join the online community @ matrix.to#/#aio-libs:m... #PyConUS2026 #Python

👋 @bdraco.org is going to be running a @pycon.us sprint on Monday. Come by and say hi! The sprint link is us.pycon.org/2026/events/.... It has pointers to getting started. We've also started a GH project to organize possible ideas: github.com/orgs/aio-lib.... #PyConUS #PyConUS2026 #Python

aiohttp 3.12.15 released! 🚀 Fixed DigestAuthMiddleware algorithm case preservation for better server compatibility. Plus improved docs & packaging updates. github.com/aio-libs/aio...

aiohttp 3.12.13 released! 🚀 Fixed auto-created TCPConnector not using session's event loop when ClientSession created without explicit connector. github.com/aio-libs/aio...

aiohttp 3.12.12: Fixed cookie handling bugs - proper octal escape sequences in values & Cookie header parsing now treats attributes as cookies per RFC 6265 github.com/aio-libs/aio...

frozenlist 1.7.0: Added deepcopy support. Fixed debug in wheels for better performance. Line tracing now opt-in. Enforced Cython version pinning. github.com/aio-libs/fro...

propcache 0.3.2: Fixed docs, upgraded to Cython 3.1, made line tracing opt-in to fix build issues & improve performance. github.com/aio-libs/pro...

aiohttp 3.12.11: Improved SSL handling with 0s shutdown timeout for instant abort on close. Graceful shutdown during normal ops. ssl_shutdown_timeout deprecated. github.com/aio-libs/aio...

aiohttp 3.12.10 fixes memory leak of aiodns.DNSResolver when TCPConnector closes without custom resolver. Regression from 3.12.0. Thanks Tasssadar github.com/aio-libs/aio...

aiohttp 3.12.9: Fixed memory issue where IOBasePayload/TextIOPayload read entire files into memory when streaming. Now correctly chunks large file uploads (64KB chunks) github.com/aio-libs/aio...

aiohttp 3.12.8: Added preemptive digest auth to DigestAuthMiddleware! Reuses credentials for same protection space, avoiding extra auth trips. Matches browser behavior. github.com/aio-libs/aio...

aiohttp 3.12.7 is out! Major cookie fixes: handles special chars in names, fixes mismatched quotes, and preserves duplicate names with different domains/paths. github.com/aio-libs/aio...

aiohttp 3.12.6 is out! This release fixes spurious "Future exception was never retrieved" warnings for connection lost errors. github.com/aio-libs/aio...

aiohttp 3.12.5 is out! New ssl_shutdown_timeout param to control TLS cleanup timeout (Python 3.11+). Plus perf boost with collections.abc types. Update now! github.com/aio-libs/aio...

aiohttp 3.12.3 now available: Fixed memory leak in CookieJar.filter_cookies causing unbounded memory growth when making requests to different URL paths which was introduced in 3.10.x github.com/aio-libs/aio...

aiohttp 3.12.2 is out! Fixes Content-Length header regression for non-GET requests with None body. Now correctly sets to 0. #python #aiohttp github.com/aio-libs/aio...

🚀 aiohttp 3.12.1 is here! This release solves long-standing issues with POST requests failing on redirects, and more recently, using digest authentication with request bodies. No more "Form data has been processed already" or "I/O operation on closed file" errors!

3.12.0 is out! New features: • Client middleware for auth, logging & request modification • HTTP Digest Auth • Custom zlib backends • Better resolver for better performance • Small requests/responses now coalesce into single packets Plus bug fixes, armv7l wheels & more! github.com/aio-libs/aio...

#PyConUS keeps going

multidict 6.4.4 is out! This release fixes segfaults in setdefault() and direct view instantiation, and refactors internals for consistency between Python and C implementations. Details: github.com/aio-libs/mul... Sources

aiohttp 3.12.0b0 is out! This beta adds client middleware support including DigestAuthMiddleware (RFC 7616), custom zlib backend support, socket_factory in TCPConnector, and shared DNS resolver management. Try it now: github.com/aio-libs/aio...

There were layoffs at MS yesterday and 3 #Python core devs from the Faster CPython team were caught in them. If you know of any jobs, please send them their way: Eric Snow: www.linkedin.com/in/ericsnowc... Irit Katriel: www.linkedin.com/in/irit-katr... Mark Shannon: www.linkedin.com/in/mark-shan...

👋 @bdraco.org and @webknjaz.me are going to be running a @pycon.us sprint next week. Come by and say hi! The sprint link is us.pycon.org/2025/events/.... We've also started a GH project to organize possible vectors or work. But that's not restrictive. #PyConUS #PyConUS2025 #Python

aiohttp 3.11.18 released This is a bug fix release that also addresses a regression in 3.11.17 Full changes: github.com/aio-libs/aio...

aiohttp 3.11.17 released This release improves performance of the WebSocket reader and the web server. github.com/aio-libs/aio...

frozenlist 1.6.0 released This release includes free-threading support github.com/aio-libs/fro...

Thanks to months of consistent contributions by lysnikolaou of @quansight.com (Lysandros Nikolaou), all of the mandatory dependencies of #aiohttp now ship free-threaded variants of #wheels! This unlocks the same in aiohttp! Find a minute to thank him, will you? #aio-libs #Python #Packaging

yarl 1.20.0 released This release includes free-threading support. github.com/aio-libs/yar...

multidict 6.4.3 released The 6.4.x series significantly improves performances for many operations and fixes some long standing memory leaks. full changes: github.com/aio-libs/mul... codspeed: codspeed.io/aio-libs/mul...

yarl 1.19.0 Release This release adds armv7l wheels, fixes a bug for `with_suffix`, and significantly improves performance when parsing query strings and unquoting. yarl and aiohttp performances have improved significantly over the last year. Full changes: github.com/aio-libs/yar...

aiohttp 3.11.16 release This is a bugfix release changes: github.com/aio-libs/aio...

aiohttp 3.11.15 released This is mainly a bugfix release with performance improvements for sending HTTP headers and reading WebSocket messages. changes: github.com/aio-libs/aio...

multidict v6.2.0 is out. The most prominent update in that it started shipping free-threaded wheels. multidict.aio-libs.org/en/stable/ch... #Python #aio-libs #asyncio #aiohttp

aiohttp 3.11.14 released This is mainly a bugfix release with a performance improvement on the server side for requests with a payload. changes: github.com/aio-libs/aio...

Finally released a new version 0.5.0a0 of `sphinxcontrib-towncrier` — my #Sphinx extension for injecting future draft/unreleased bits of Towncrier-managed change logs. The main theme of this version is supporting Towncrier 24.7.0rc1 and higher. github.com/sphinx-contr... #Python #Towncrier

aiohttp 3.11.13 released This is mainly a bugfix release to solve compatibility issues with uvloop changes: github.com/aio-libs/aio...