CVE-2026-54275 AIOHTTP: TLS Server Hostname Override Is Ignored When Reusing HTTPS Connections

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, the serverhostname TLS SNI check can be bypassed when an existing connection is reused. If an application makes multiple requests to the same domain, but with different per-request serverhostname...

CVE-2026-54275

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, the serverhostname TLS SNI check can be bypassed when an existing connection is reused. If an application makes multiple requests to the same domain, but with different per-request serverhostname...

CVE-2026-54275 AIOHTTP: TLS Server Hostname Override Is Ignored When Reusing HTTPS Connections

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, the serverhostname TLS SNI check can be bypassed when an existing connection is reused. If an application makes multiple requests to the same domain, but with different per-request serverhostname...

CVE-2026-54275

CVE-2026-54275 (aiohttp) affects the aiohttp package prior to 3.14.1. The issue is a TLS server_hostname SNI check bypass that occurs when an existing connection is reused for multiple requests with different per-request server_hostname values. As a result, later requests to the same domain may r...

CVE-2026-54275

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, the serverhostname TLS SNI check can be bypassed when an existing connection is reused. If an application makes multiple requests to the same domain, but with different per-request serverhostname...

CVE-2026-54274 AIOHTTP: Incomplete websocket frame payloads bypass memory limits

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, if an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use. This vulnerability is fixed in 3.14.1...

EUVD-2026-38311

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, if an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use. This vulnerability is fixed in 3.14.1...

CVE-2026-54274

The CVE-2026-54274 entry concerns AIOHTTP (async HTTP framework for asyncio/Python). It identifies that prior to version 3.14.1, an attacker could send large incomplete websocket frame payloads, potentially bypassing memory-use limits. The vulnerability affects AIOHTTP’s websocket handling logic ...

CVE-2026-54274

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, if an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use. This vulnerability is fixed in 3.14.1...

CVE-2026-54274

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, if an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use. This vulnerability is fixed in 3.14.1...

CVE-2026-54274

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, if an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use. This vulnerability is fixed in 3.14.1...

CVE-2026-54274 AIOHTTP: Incomplete websocket frame payloads bypass memory limits

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, if an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use. This vulnerability is fixed in 3.14.1...

0x20bf (0.0.1), 2keys (0.5.1) +3564 more potentially affected by CVE-2026-54274 via aiohttp (>=0.6.4, <=3.14.0)

aiohttp PYPI version =0.6.4, =0.0.1a0, =0.0.15, =0.1.0, =0.5.0a0, =3.0.1, =1.0.0, =1.0.0, =0.0.1, =1.0.2, =0.2.1, =0.1.2, =0.1.9 and more Source cves: CVE-2026-54274 Source advisory: MEND:CVE-2026-54274...

CVE-2026-54274 AIOHTTP: Incomplete websocket frame payloads bypass memory limits

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, if an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use. This vulnerability is fixed in 3.14.1...

0x20bf (0.0.1), 2keys (0.5.1) +3564 more potentially affected by CVE-2026-54279 via aiohttp (>=0.6.4, <=3.14.0)

aiohttp PYPI version =0.6.4, =0.0.1a0, =0.0.15, =0.1.0, =0.5.0a0, =3.0.1, =1.0.0, =1.0.0, =0.0.1, =1.0.2, =0.2.1, =0.1.2, =0.1.9 and more Source cves: CVE-2026-54279 Source advisory: MEND:CVE-2026-54279...

CVE-2026-54279

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, host-only cookies that are saved with CookieJar.save and then restored later with CookieJar.load lose their host-only status. This vulnerability is fixed in 3.14.1...

CVE-2026-54279

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, host-only cookies that are saved with CookieJar.save and then restored later with CookieJar.load lose their host-only status. This vulnerability is fixed in 3.14.1...

CVE-2026-54279 AIOHTTP: Host-Only Cookies Become Domain Cookies After CookieJar Persistence

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, host-only cookies that are saved with CookieJar.save and then restored later with CookieJar.load lose their host-only status. This vulnerability is fixed in 3.14.1...

CVE-2026-54279

CVE-2026-54279 affects the aiohttp library (Python asyncio framework). Prior to version 3.14.1, host-only cookies saved with CookieJar.save() and later restored with CookieJar.load() may lose their host-only status, effectively becoming domain cookies. The issue is fixed in aiohttp 3.14.1. Affect...

CVE-2026-54279 AIOHTTP: Host-Only Cookies Become Domain Cookies After CookieJar Persistence

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, host-only cookies that are saved with CookieJar.save and then restored later with CookieJar.load lose their host-only status. This vulnerability is fixed in 3.14.1...