CVE-2026-34513

A flaw was found in AIOHTTP, an asynchronous HTTP client/server framework for asyncio and Python. This vulnerability allows a remote attacker to cause excessive memory usage by exploiting an unbounded Domain Name System DNS cache. This can lead to a Denial of Service DoS condition, making the...

CVE-2026-34516

A flaw was found in AIOHTTP, an asynchronous HTTP client/server framework for asyncio and Python. A remote attacker could exploit this vulnerability by sending a response with an excessive number of multipart headers. This could cause the system to consume more memory than intended, leading to a...

CVE-2026-34515

A flaw was found in AIOHTTP, an asynchronous HTTP client/server framework. On Windows systems, the static resource handler may inadvertently expose sensitive information related to a NTLMv2 remote path. This information disclosure vulnerability could allow an attacker to gain insights into the...

muffin (>=0.1.5, <=0.1.6) potentially affected by CVE-2026-34525 via aiohttp (0.17.3)

aiohttp PYPI version 0.17.3 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - muffin =0.1.5, =0.1.6 Source cves: CVE-2026-34525 Source advisory: OSV:GHSA-C427-H43C-VF67...

aiodocker (0.7.0), aiopogo (>=1.6.0b1, <=2.0.0) +10 more potentially affected by CVE-2026-34525 via aiohttp (2.0.7)

aiohttp PYPI version 2.0.7 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - aiodocker 0.7.0 - aiopogo =1.6.0b1, =0.1.0, =0.1.0, =0.42.4, =0.0.1, =0.9.6, =1.1.0, =1.3.3 Source cves: CVE-2026-34525 Source advisory:...

AIOHTTP accepts duplicate Host headers

Summary Multiple Host headers were allowed in aiohttp. Impact Mostly this doesn't affect aiohttp security itself, but if a reverse proxy is applying security rules depending on the target Host, it is theoretically possible that the proxy and aiohttp could process different host names, possibly...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling via the processing of duplicate Host headers. An attacker can bypass security checks enforced by a reverse proxy by sending requests with multiple Host headers, potentially causing the proxy and the backend to...

goblin (1.0.0b1) potentially affected by CVE-2026-34525 via aiohttp (0.22.1)

aiohttp PYPI version 0.22.1 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - goblin 1.0.0b1 Source cves: CVE-2026-34525 Source advisory: OSV:GHSA-C427-H43C-VF67...

muffin (0.5.0) potentially affected by CVE-2026-34525 via aiohttp (0.20.0)

aiohttp PYPI version 0.20.0 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - muffin 0.5.0 Source cves: CVE-2026-34525 Source advisory: OSV:GHSA-C427-H43C-VF67...

interest (0.0.1) potentially affected by CVE-2026-34525 via aiohttp (0.14.0)

aiohttp PYPI version 0.14.0 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - interest 0.0.1 Source cves: CVE-2026-34525 Source advisory: OSV:GHSA-C427-H43C-VF67...

GHSA-C427-H43C-VF67 AIOHTTP accepts duplicate Host headers

Summary Multiple Host headers were allowed in aiohttp. Impact Mostly this doesn't affect aiohttp security itself, but if a reverse proxy is applying security rules depending on the target Host, it is theoretically possible that the proxy and aiohttp could process different host names, possibly...

aioboto3 (>=1.1.0, <=2.1.0), aiobotocore (>=0.4.2, <=0.4.5) +2 more potentially affected by CVE-2026-34525 via aiohttp (2.3.0)

aiohttp PYPI version 2.3.0 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - aioboto3 =1.1.0, =0.4.2, =0.4.1b31, =0.6.0b19, =0.6.0b23 Source cves: CVE-2026-34525 Source advisory: OSV:GHSA-C427-H43C-VF67...

muffin (>=0.0.2, <=0.0.22) potentially affected by CVE-2026-34525 via aiohttp (0.14.1)

aiohttp PYPI version 0.14.1 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - muffin =0.0.2, =0.0.22 Source cves: CVE-2026-34525 Source advisory: OSV:GHSA-C427-H43C-VF67...

muffin (>=0.0.23, <=0.0.45) potentially affected by CVE-2026-34525 via aiohttp (0.14.4)

aiohttp PYPI version 0.14.4 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - muffin =0.0.23, =0.0.45 Source cves: CVE-2026-34525 Source advisory: OSV:GHSA-C427-H43C-VF67...

0x20bf (0.0.1), 2keys (0.5.1) +3262 more potentially affected by CVE-2026-34525 via aiohttp (>=3.0.0b0, <=3.13.3)

aiohttp PYPI version =3.0.0b0, =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-2026-34525 Source advisory: SNYK:PYTHON-AIOHTTP-15873733...

0x20bf (0.0.1), 2keys (0.5.1) +3262 more potentially affected by CVE-2026-34525 via aiohttp (>=3.0.0b0, <=3.13.3)

aiohttp PYPI version =3.0.0b0, =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-2026-34525 Source advisory: OSV:GHSA-C427-H43C-VF67...

0x20bf (0.0.1), 2keys (0.5.1) +3262 more potentially affected by CVE-2026-34525 via aiohttp (>=3.0.0b0, <=3.13.3)

aiohttp PYPI version =3.0.0b0, =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-2026-34525 Source advisory: GHSA-C427-H43C-VF67...

aioboto3 (2.2.0), aiobotocore (>=0.5.0, <=0.5.3) +56 more potentially affected by CVE-2026-34525 via aiohttp (2.3.10)

aiohttp PYPI version 2.3.10 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - aioboto3 2.2.0 - aiobotocore =0.5.0, =0.8.4, =0.1.0a1, =1.0.0, =3.0.0b4, =2.0.0, =1.1.1, =1.2.1, =2.1.0, =0.8.22, =2.0.0, =2.0.13 and more Source...

hdx-data-freshness (>=1.0.5, <=1.1.2), pyplanet (>=0.6.0rc1, <=0.10.5) potentially affected by CVE-2026-34525 via aiohttp (2.3.9)

aiohttp PYPI version 2.3.9 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - hdx-data-freshness =1.0.5, =0.6.0rc1, =0.10.5 Source cves: CVE-2026-34525 Source advisory: OSV:GHSA-C427-H43C-VF67...

opentrons (>=3.7.0, <=3.11.4) potentially affected by CVE-2026-34525 via aiohttp (2.3.8)

aiohttp PYPI version 2.3.8 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - opentrons =3.7.0, =3.11.4 Source cves: CVE-2026-34525 Source advisory: OSV:GHSA-C427-H43C-VF67...