aiohttp: Unread Compressed Request Bodies Bypass client_max_size During Cleanup

Summary During cleanup it is possible for a compressed request body to be decompressed into memory in one chunk. Impact An attacker may be able to send a compressed payload in specific situations that could be decompressed into memory, potentially leading to DoS a zip bomb edge case. Workaround...

227checkergenerator (>=1.0.0 <=1.0.1), 5mghost-rover (>=0.0.1 <=0.0.3) +1732 more potentially affected by CVE-2026-54278 via aiohttp (>=3.0.0b0 <=3.14.0)

aiohttp PYPI version =3.0.0b0, =1.0.0, =0.0.1, =0.1.1, =0.1.0b0, =1.1.0, =1.0.1, =0.31.5, =0.6.0, =0.0.0, =0.0.33.post1 and more Source cves: CVE-2026-54278 Source advisory: SNYK:PYTHON-AIOHTTP-17342413...

GHSA-G3CQ-J2XW-WF74 aiohttp: Unread Compressed Request Bodies Bypass client_max_size During Cleanup

Summary During cleanup it is possible for a compressed request body to be decompressed into memory in one chunk. Impact An attacker may be able to send a compressed payload in specific situations that could be decompressed into memory, potentially leading to DoS a zip bomb edge case. Workaround...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the C HTTP parser when the maxlinesize check is bypassed for fragmented lines. An attacker can cause excessive memory consumption by sending oversized HTTP request lines, potential...

GHSA-63HW-FMQ6-XXG2 aiohttp: C HTTP Parser Bypasses max_line_size for Fragmented Lines

Summary It is possible to bypass the maxlinesize check in parts of an HTTP request in the C parser. Impact If using the optimised C parser the default in pre-built wheels, then an attacker may be able to send oversized lines through the HTTP parser and use an excessive amount of memory, potential...

227checkergenerator (>=1.0.0 <=1.0.1), 5mghost-rover (>=0.0.1 <=0.0.3) +1861 more potentially affected by CVE-2026-54277 via aiohttp (>=0.13.1 <=3.14.0)

aiohttp PYPI version =0.13.1, =1.0.0, =0.0.1, =0.1.1, =0.1.0b0, =1.1.0, =1.0.1, =0.31.5, =0.6.0, =0.0.0, =0.0.33.post1 and more Source cves: CVE-2026-54277 Source advisory: OSV:GHSA-63HW-FMQ6-XXG2...

227checkergenerator (>=1.0.0 <=1.0.1), 5mghost-rover (>=0.0.1 <=0.0.3) +1732 more potentially affected by CVE-2026-54277 via aiohttp (>=3.0.0b0 <=3.14.0)

aiohttp PYPI version =3.0.0b0, =1.0.0, =0.0.1, =0.1.1, =0.1.0b0, =1.1.0, =1.0.1, =0.31.5, =0.6.0, =0.0.0, =0.0.33.post1 and more Source cves: CVE-2026-54277 Source advisory: SNYK:PYTHON-AIOHTTP-17342401...

Insufficiently Protected Credentials

Overview Affected versions of this package are vulnerable to Insufficiently Protected Credentials via the DigestAuthMiddleware class when authentication responses are sent after following cross-origin redirects. An attacker can obtain authentication digests by leveraging an open redirect or simil...

227checkergenerator (>=1.0.0 <=1.0.1), 5mghost-rover (>=0.0.1 <=0.0.3) +1861 more potentially affected by CVE-2026-54279 via aiohttp (>=0.13.1 <=3.14.0)

aiohttp PYPI version =0.13.1, =1.0.0, =0.0.1, =0.1.1, =0.1.0b0, =1.1.0, =1.0.1, =0.31.5, =0.6.0, =0.0.0, =0.0.33.post1 and more Source cves: CVE-2026-54279 Source advisory: OSV:GHSA-2FQR-MR3J-6WP8...

GHSA-2FQR-MR3J-6WP8 aiohttp: Host-Only Cookies Become Domain Cookies After CookieJar Persistence

Summary Host-only cookies that are saved with CookieJar.save and then restored later with CookieJar.load lose their host-only status. Impact Host-only cookies that have been loaded from disk may get sent to subdomains that previously should have been disallowed. ----- Patch:...

aiohttp: Host-Only Cookies Become Domain Cookies After CookieJar Persistence

Summary Host-only cookies that are saved with CookieJar.save and then restored later with CookieJar.load lose their host-only status. Impact Host-only cookies that have been loaded from disk may get sent to subdomains that previously should have been disallowed. ----- Patch:...

Exposure of Private Personal Information to an Unauthorized Actor

Overview Affected versions of this package are vulnerable to Exposure of Private Personal Information to an Unauthorized Actor in the CookieJar.save and CookieJar.load functions. An attacker can cause cookies intended for a specific host to be sent to subdomains by persisting and restoring cookie...

227checkergenerator (>=1.0.0 <=1.0.1), 5mghost-rover (>=0.0.1 <=0.0.3) +1732 more potentially affected by CVE-2026-54279 via aiohttp (>=3.0.0b0 <=3.14.0)

aiohttp PYPI version =3.0.0b0, =1.0.0, =0.0.1, =0.1.1, =0.1.0b0, =1.1.0, =1.0.1, =0.31.5, =0.6.0, =0.0.0, =0.0.33.post1 and more Source cves: CVE-2026-54279 Source advisory: SNYK:PYTHON-AIOHTTP-17342393...

HTTP Response Splitting

Overview Affected versions of this package are vulnerable to HTTP Response Splitting via MultipartWriter.append or Payload.headers when attacker-controlled input is included in multipart or payload headers. An attacker can inject additional headers or alter the contents of a request by supplying...

227checkergenerator (>=1.0.0 <=1.0.1), 5mghost-rover (>=0.0.1 <=0.0.3) +1830 more potentially affected by CVE-2026-50269 via aiohttp (>=0.13.1 <=3.13.5)

aiohttp PYPI version =0.13.1, =1.0.0, =0.0.1, =0.1.1, =0.1.0b0, =1.1.0, =1.0.1, =0.6.0, =0.0.0, =0.0.2, =0.0.3 and more Source cves: CVE-2026-50269 Source advisory: OSV:GHSA-M6QW-4CW2-HM4M...

aiohttp: CRLF injection in multipart headers

Summary Attacker-controlled input included into multipart/payload headers can be used to modify a request to inject additional headers or similar. Impact In the unlikely situation that an application is passing user-controlled strings into MultipartWriter.appendheaders=... or Payload.headers, the...

227checkergenerator (>=1.0.0 <=1.0.1), 5mghost-rover (>=0.0.1 <=0.0.3) +1701 more potentially affected by CVE-2026-50269 via aiohttp (>=3.0.0b0 <=3.13.5)

aiohttp PYPI version =3.0.0b0, =1.0.0, =0.0.1, =0.1.1, =0.1.0b0, =1.1.0, =1.0.1, =0.6.0, =0.0.0, =0.0.2, =0.0.3 and more Source cves: CVE-2026-50269 Source advisory: SNYK:PYTHON-AIOHTTP-17342380...

GHSA-M6QW-4CW2-HM4M aiohttp: CRLF injection in multipart headers

Summary Attacker-controlled input included into multipart/payload headers can be used to modify a request to inject additional headers or similar. Impact In the unlikely situation that an application is passing user-controlled strings into MultipartWriter.appendheaders=... or Payload.headers, the...

aioHTTP < 3.14.0 Multiple Vulnerabilities

The version of aioHTTP installed on the remote host is prior to 3.14.0. It is, therefore, affected by multiple vulnerabilities: - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0, using CookieJar.load with untrusted input may allow arbitrary...

CVE-2026-34993

A flaw was found in AIOHTTP, an asynchronous HTTP client/server framework for asyncio and Python. An attacker could exploit this vulnerability by providing untrusted input to the CookieJar.load function. This could potentially lead to arbitrary code execution, allowing the attacker to run malicio...