CVE-2026-34518 AIOHTTP: Cookie and Proxy-Authorization headers leaked on cross-origin redirect

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, when following redirects to a different origin, aiohttp drops the Authorization header, but retains the Cookie and Proxy-Authorization headers. This issue has been patched in version 3.13.4...

CVE-2026-34518 AIOHTTP: Cookie and Proxy-Authorization headers leaked on cross-origin redirect

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, when following redirects to a different origin, aiohttp drops the Authorization header, but retains the Cookie and Proxy-Authorization headers. This issue has been patched in version 3.13.4...

CVE-2026-34518

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, when following redirects to a different origin, aiohttp drops the Authorization header, but retains the Cookie and Proxy-Authorization headers. This issue has been patched in version 3.13.4...

0x20bf (0.0.1), 2keys (0.5.1) +3370 more potentially affected by CVE-2026-34518 via aiohttp (>=0.6.4, <=3.13.3)

aiohttp PYPI version =0.6.4, =0.0.1a0, =0.0.15, =0.1.0, =0.5.0a0, =1.0.0, =1.0.0, =0.0.1, =1.0.2, =0.2.1, =0.1.2, =0.1.9 - ab-data-processing 0.0.1 and more Source cves: CVE-2026-34518 Source advisory: MEND:CVE-2026-34518...

CVE-2026-34518 AIOHTTP: Cookie and Proxy-Authorization headers leaked on cross-origin redirect

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, when following redirects to a different origin, aiohttp drops the Authorization header, but retains the Cookie and Proxy-Authorization headers. This issue has been patched in version 3.13.4...

CVE-2026-34518

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, when following redirects to a different origin, aiohttp drops the Authorization header, but retains the Cookie and Proxy-Authorization headers. This issue has been patched in version 3.13.4...

CVE-2026-34518

CVE-2026-34518 affects aiohttp prior to 3.13.4: during cross-origin redirects, the client/server framework drops the Authorization header but keeps Cookie and Proxy-Authorization headers. This could expose sensitive cookie-related data across origins. The issue is fixed in aiohttp 3.13.4.

CVE-2026-34518

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, when following redirects to a different origin, aiohttp drops the Authorization header, but retains the Cookie and Proxy-Authorization headers. This issue has been patched in version 3.13.4...

CVE-2026-34517

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, for some multipart form fields, aiohttp read the entire field into memory before checking clientmaxsize. This issue has been patched in version 3.13.4...

CVE-2026-34517 AIOHTTP: Late size enforcement for non-file multipart fields causes memory DoS

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, for some multipart form fields, aiohttp read the entire field into memory before checking clientmaxsize. This issue has been patched in version 3.13.4...

CVE-2026-34517 AIOHTTP: Late size enforcement for non-file multipart fields causes memory DoS

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, for some multipart form fields, aiohttp read the entire field into memory before checking clientmaxsize. This issue has been patched in version 3.13.4...

0x20bf (0.0.1), 2keys (0.5.1) +3370 more potentially affected by CVE-2026-34517 via aiohttp (>=0.6.4, <=3.13.3)

aiohttp PYPI version =0.6.4, =0.0.1a0, =0.0.15, =0.1.0, =0.5.0a0, =1.0.0, =1.0.0, =0.0.1, =1.0.2, =0.2.1, =0.1.2, =0.1.9 - ab-data-processing 0.0.1 and more Source cves: CVE-2026-34517 Source advisory: MEND:CVE-2026-34517...

CVE-2026-34517

CVE-2026-34517 (AIOHTTP) affects the AIOHTTP Python library. Before version 3.13.4, some multipart form fields caused the library to read the entire field into memory before enforcing the request size limit (client_max_size), creating a potential memory-based denial of service. The issue has been...

CVE-2026-34517

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, for some multipart form fields, aiohttp read the entire field into memory before checking clientmaxsize. This issue has been patched in version 3.13.4...

CVE-2026-34517

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, for some multipart form fields, aiohttp read the entire field into memory before checking clientmaxsize. This issue has been patched in version 3.13.4...

CVE-2026-34517

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, for some multipart form fields, aiohttp read the entire field into memory before checking clientmaxsize. This issue has been patched in version 3.13.4...

CVE-2026-34516

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, a response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability. This issue has been patched in version 3.13....

CVE-2026-34516 AIOHTTP: Multipart Header Size Bypass

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, a response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability. This issue has been patched in version 3.13....

CVE-2026-34516 AIOHTTP: Multipart Header Size Bypass

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, a response with an excessive number of multipart headers may be allowed to use more memory than intended, potentially allowing a DoS vulnerability. This issue has been patched in version 3.13....

0x20bf (0.0.1), 2keys (0.5.1) +3370 more potentially affected by CVE-2026-34516 via aiohttp (>=0.6.4, <=3.13.3)

aiohttp PYPI version =0.6.4, =0.0.1a0, =0.0.15, =0.1.0, =0.5.0a0, =1.0.0, =1.0.0, =0.0.1, =1.0.2, =0.2.1, =0.1.2, =0.1.9 - ab-data-processing 0.0.1 and more Source cves: CVE-2026-34516 Source advisory: MEND:CVE-2026-34516...