0x20bf (0.0.1), 2keys (0.5.1) +3261 more potentially affected by CVE-2026-34520 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-2026-34520 Source advisory: GHSA-63HF-3VF5-4WQF...

hdx-data-freshness (>=1.0.5, <=1.1.2), pyplanet (>=0.6.0rc1, <=0.10.5) potentially affected by CVE-2026-34520 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-2026-34520 Source advisory: OSV:GHSA-63HF-3VF5-4WQF...

opentrons (>=3.7.0, <=3.11.4) potentially affected by CVE-2026-34520 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-2026-34520 Source advisory: OSV:GHSA-63HF-3VF5-4WQF...

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:GHSA-63HF-3VF5-4WQF...

s2aio (>=1.12.0, <=1.14.0) potentially affected by CVE-2026-34520 via aiohttp (0.22.4)

aiohttp PYPI version 0.22.4 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - s2aio =1.12.0, =1.14.0 Source cves: CVE-2026-34520 Source advisory: OSV:GHSA-63HF-3VF5-4WQF...

GHSA-63HF-3VF5-4WQF AIOHTTP's C parser (llhttp) accepts null bytes and control characters in response header values - header injection/security bypass

Summary The C parser the default for most installs accepted null bytes and control characters in request headers. Impact An attacker could send header values that are interpreted differently than expected due to the presence of control characters. For example, request.url.origin may return a...

devtools-proxy (>=0.0.2, <=0.0.3) potentially affected by CVE-2026-34520 via aiohttp (1.1.4)

aiohttp PYPI version 1.1.4 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - devtools-proxy =0.0.2, =0.0.3 Source cves: CVE-2026-34520 Source advisory: OSV:GHSA-63HF-3VF5-4WQF...

polyswarm-api (>=0.1.0, <=0.2.2), polyswarm-client (>=1.0.0rc0, <=1.0.2) +1 more potentially affected by CVE-2026-34520 via aiohttp (2.3.1)

aiohttp PYPI version 2.3.1 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - polyswarm-api =0.1.0, =1.0.0rc0, =0.2.0a7, =0.2.0a10 Source cves: CVE-2026-34520 Source advisory: OSV:GHSA-63HF-3VF5-4WQF...

aiopixiv (1.0.5) potentially affected by CVE-2026-34520 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-2026-34520 Source advisory: OSV:GHSA-63HF-3VF5-4WQF...

0x20bf (0.0.1), 2keys (0.5.1) +3261 more potentially affected by CVE-2026-34520 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-2026-34520 Source advisory: OSV:GHSA-63HF-3VF5-4WQF...

pyplanet (0.5.3) potentially affected by CVE-2026-34520 via aiohttp (2.3.3)

aiohttp PYPI version 2.3.3 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - pyplanet 0.5.3 Source cves: CVE-2026-34520 Source advisory: OSV:GHSA-63HF-3VF5-4WQF...

muffin (>=0.4.0, <=0.4.2) potentially affected by CVE-2026-34520 via aiohttp (0.19.0)

aiohttp PYPI version 0.19.0 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - muffin =0.4.0, =0.4.2 Source cves: CVE-2026-34520 Source advisory: OSV:GHSA-63HF-3VF5-4WQF...

iamine (>=0.1.5, <=0.1.6) potentially affected by CVE-2026-34520 via aiohttp (0.13.1)

aiohttp PYPI version 0.13.1 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - iamine =0.1.5, =0.1.6 Source cves: CVE-2026-34520 Source advisory: OSV:GHSA-63HF-3VF5-4WQF...

muffin (0.5.0) potentially affected by CVE-2026-34520 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-2026-34520 Source advisory: OSV:GHSA-63HF-3VF5-4WQF...

GHSA-MWH4-6H8G-PG8W AIOHTTP has HTTP response splitting via \r in reason phrase

Summary An attacker who controls the reason parameter when creating a Response may be able to inject extra headers or similar exploits. Impact In the unlikely situation that an application allows untrusted data to be used in the response's reason parameter, then an attacker could manipulate the...

HTTP Response Splitting

Overview Affected versions of this package are vulnerable to HTTP Response Splitting via the reason parameter in the HTTP response creation process. An attacker can inject unauthorized headers or manipulate the HTTP response by supplying specially crafted input containing carriage return...

muffin (>=0.6.0, <=0.6.1) potentially affected by CVE-2026-34519 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-2026-34519 Source advisory: OSV:GHSA-MWH4-6H8G-PG8W...

hassmart-homeassistant (>=0.59.2, <=0.59.2.1), homeassistant (>=0.59.0, <=0.59.2) potentially affected by CVE-2026-34519 via aiohttp (2.3.5)

aiohttp PYPI version 2.3.5 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - hassmart-homeassistant =0.59.2, =0.59.0, =0.59.2 Source cves: CVE-2026-34519 Source advisory: OSV:GHSA-MWH4-6H8G-PG8W...

muffin (>=0.0.98, <=0.0.104) potentially affected by CVE-2026-34519 via aiohttp (0.16.6)

aiohttp PYPI version 0.16.6 is affected by a known vulnerability. The following packages have a transitive dependency on aiohttp and may be impacted: - muffin =0.0.98, =0.0.104 Source cves: CVE-2026-34519 Source advisory: OSV:GHSA-MWH4-6H8G-PG8W...

0x20bf (0.0.1), 2keys (0.5.1) +3261 more potentially affected by CVE-2026-34519 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-2026-34519 Source advisory: GHSA-MWH4-6H8G-PG8W...