CVE-2026-34519

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an attacker who controls the reason parameter when creating a Response may be able to inject extra headers or similar exploits. This issue has been patched in version 3.13.4...

CVE-2026-34525

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, multiple Host headers were allowed in aiohttp. This issue has been patched in version 3.13.4...

CVE-2026-34520

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, the C parser the default for most installs accepted null bytes and control characters in response headers. This issue has been patched in version 3.13.4...

homeassistant (>=0.42.0, <=0.42.3) potentially affected by CVE-2026-34520 via aiohttp (2.0.5)

aiohttp PYPI version 2.0.5 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - homeassistant =0.42.0, =0.42.3 Source cves: CVE-2026-34520 Source advisory: OSV:PYSEC-2026-2102...

AZL-81773 CVE-2026-34518 affecting package python-aiohttp 3.6.2-3

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...

aiohttp-cors (0.3.0), aslack (0.11.0) +1 more potentially affected by CVE-2026-34520 via aiohttp (0.20.2)

aiohttp PYPI version 0.20.2 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - aiohttp-cors 0.3.0 - aslack 0.11.0 - muffin =0.5.2, =0.5.12 Source cves: CVE-2026-34520 Source advisory: OSV:PYSEC-2026-2102...

aiopixiv (1.0.5) potentially affected by CVE-2026-34518 via aiohttp (2.0.4)

aiohttp PYPI version 2.0.4 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - aiopixiv 1.0.5 Source cves: CVE-2026-34518 Source advisory: OSV:PYSEC-2026-2100...

homeassistant (>=0.36.0, <=0.37.1), hypr (0.8.2) +3 more potentially affected by CVE-2026-34518 via aiohttp (1.2.0)

aiohttp PYPI version 1.2.0 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - homeassistant =0.36.0, =0.1.0, =0.1.0, =1.5.9, =1.5.12 Source cves: CVE-2026-34518 Source advisory: OSV:PYSEC-2026-2100...

homeassistant (0.42.1) potentially affected by CVE-2026-34518 via aiohttp (2.0.6)

aiohttp PYPI version 2.0.6 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - homeassistant 0.42.1 Source cves: CVE-2026-34518 Source advisory: OSV:PYSEC-2026-2100...

muffin (>=0.0.2, <=0.0.22) potentially affected by CVE-2026-34518 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-2026-34518 Source advisory: OSV:PYSEC-2026-2100...

botstory (>=0.0.33, <=0.0.37) potentially affected by CVE-2026-34525 via aiohttp (1.1.1)

aiohttp PYPI version 1.1.1 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - botstory =0.0.33, =0.0.37 Source cves: CVE-2026-34525 Source advisory: OSV:PYSEC-2026-2103...

aiogremlin (3.2.6rc1), aiopogo (>=2.0.2, <=2.0.4) +22 more potentially affected by CVE-2026-34525 via aiohttp (2.2.5)

aiohttp PYPI version 2.2.5 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - aiogremlin 3.2.6rc1 - aiopogo =2.0.2, =0.1.1, =1.0.1, =1.0.0, =1.0.0, =2.1.0rc1, =2.0.0, =0.51.0, =0.2.0, =0.0.0, =0.1.1, =1.6.2, =1.6.6 and more...

homeassistant (>=0.58.0, <=0.58.1), pyplanet (>=0.5.0, <=0.5.2) +1 more potentially affected by CVE-2026-34519 via aiohttp (2.3.2)

aiohttp PYPI version 2.3.2 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - homeassistant =0.58.0, =0.5.0, =0.6.0, =0.6.2 Source cves: CVE-2026-34519 Source advisory: OSV:PYSEC-2026-2101...

aiourlshortener (>=0.0.1, <=0.0.2) potentially affected by CVE-2026-34518 via aiohttp (2.0.2)

aiohttp PYPI version 2.0.2 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - aiourlshortener =0.0.1, =0.0.2 Source cves: CVE-2026-34518 Source advisory: OSV:PYSEC-2026-2100...

homeassistant (>=0.38.0, <=0.38.4), okami (>=0.1.2, <=0.1.3) +1 more potentially affected by CVE-2026-34519 via aiohttp (1.3.1)

aiohttp PYPI version 1.3.1 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - homeassistant =0.38.0, =0.1.2, =0.1.3 - pyatv 0.1.4 Source cves: CVE-2026-34519 Source advisory: OSV:PYSEC-2026-2101...

homeassistant (>=0.36.0, <=0.37.1), hypr (0.8.2) +3 more potentially affected by CVE-2026-34520 via aiohttp (1.2.0)

aiohttp PYPI version 1.2.0 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - homeassistant =0.36.0, =0.1.0, =0.1.0, =1.5.9, =1.5.12 Source cves: CVE-2026-34520 Source advisory: OSV:PYSEC-2026-2102...

muffin (>=0.6.0, <=0.6.1) potentially affected by CVE-2026-34518 via aiohttp (0.21.2)

aiohttp PYPI version 0.21.2 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - muffin =0.6.0, =0.6.1 Source cves: CVE-2026-34518 Source advisory: OSV:PYSEC-2026-2100...

appdaemon (>=3.0.0b2, <=3.0.0b3), balebot (>=1.2.3, <=1.8.15) +4 more potentially affected by CVE-2026-34519 via aiohttp (2.3.7)

aiohttp PYPI version 2.3.7 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - appdaemon =3.0.0b2, =1.2.3, =0.61.1, =0.0.1, =0.2.1 - tictax 0.1.3 Source cves: CVE-2026-34519 Source advisory: OSV:PYSEC-2026-2101...

PYSEC-2026-2103

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, multiple Host headers were allowed in aiohttp. This issue has been patched in version 3.13.4...

appdaemon (>=3.0.0b2, <=3.0.0b3), balebot (>=1.2.3, <=1.8.15) +4 more potentially affected by CVE-2026-34525 via aiohttp (2.3.7)

aiohttp PYPI version 2.3.7 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - appdaemon =3.0.0b2, =1.2.3, =0.61.1, =0.0.1, =0.2.1 - tictax 0.1.3 Source cves: CVE-2026-34525 Source advisory: OSV:PYSEC-2026-2103...