CVE catalog

CVE-2026-47265

Severity: Medium · CVSS 6.6
Published: Jun 2, 2026, 6:32:50 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.15% · Oct 25, 2026

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0, cookies set with the `cookies` parameter on requests are sent after following a cross-origin redirect. If a developer uses the `cookies` parameter on a per-request basis then sensitive data might be leaked to an attacker if they manage to control a redirect. Version 3.14.0 patches the issue. If unable to upgrade, using a `Cookie` header in the `headers` parameter is not vulnerable.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	python-aiohttp	sid	`3.14.3-1`	fixed
Debian	python-aiohttp	forky	`3.14.3-1`	fixed
Debian	python-aiohttp	trixie	`3.11.16-1+deb13u1`	vulnerable
Debian	python-aiohttp	trixie-security	`3.11.16-1+deb13u1`	vulnerable
Debian	python-aiohttp	bookworm	`3.8.4-1+deb12u1`	vulnerable
Debian	python-aiohttp	bookworm-security	`3.8.4-1+deb12u1`	vulnerable
Cpe	python-aiohttp	Not reported	Not reported	vulnerable
Cpe	aiohttp	Not reported	`3.14.0`	fixed
PyPI	aiohttp	Not reported	`3.14.0`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	python-aiohttp	source	sid	`3.14.0-1`	not yet assigned	Not reported	[1138780]
Debian	python-aiohttp	source	forky	`3.14.0-1`	not yet assigned	Not reported	[1138780]
Debian	python-aiohttp	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1138780]
Debian	python-aiohttp	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1138780]
Cpe	aiohttp	cpe	Not reported	`3.14.0`	Not reported	Not reported	Not reported
PyPI	aiohttp	PyPI	Not reported	`3.14.0`	Not reported	GHSA-HG6J-4RV6-33PG	Not reported

[Debian bug #1138780]

Notes

[trixie] python-aiohttp: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[python3-aiohttp]Affected
Source package: [python-aiohttp]
Details (4)
- 3.8.4-1+deb12u1 · amd64 · bookworm
  Affected
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
- 3.8.4-1+deb12u1 · arm64 · bookworm
  Affected
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
- 3.8.4-1+deb12u1 · amd64 · bookworm-security
  Affected
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
- 3.8.4-1+deb12u1 · arm64 · bookworm-security
  Affected
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
[python-aiohttp-doc]Affected
Source package: [python-aiohttp]
Details (4)
- 3.8.4-1+deb12u1 · all · bookworm
  Affected
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
- 3.8.4-1+deb12u1 · all · bookworm
  Affected
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
- 3.8.4-1+deb12u1 · all · bookworm-security
  Affected
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
- 3.8.4-1+deb12u1 · all · bookworm-security
  Affected
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12

[Debian 13 (Trixie)]

[python3-aiohttp]Affected
Source package: [python-aiohttp]
Details (4)
- 3.11.16-1+deb13u1 · amd64 · trixie
  Affected
  nvd · python-aiohttp · debian · 13
- 3.11.16-1+deb13u1 · arm64 · trixie
  Affected
  nvd · python-aiohttp · debian · 13
- 3.11.16-1+deb13u1 · amd64 · trixie-security
  Affected
  nvd · python-aiohttp · debian · 13
- 3.11.16-1+deb13u1 · arm64 · trixie-security
  Affected
  nvd · python-aiohttp · debian · 13
[python-aiohttp-doc]Affected
Source package: [python-aiohttp]
Details (4)
- 3.11.16-1+deb13u1 · all · trixie
  Affected
  nvd · python-aiohttp · debian · 13
- 3.11.16-1+deb13u1 · all · trixie
  Affected
  nvd · python-aiohttp · debian · 13
- 3.11.16-1+deb13u1 · all · trixie-security
  Affected
  nvd · python-aiohttp · debian · 13
- 3.11.16-1+deb13u1 · all · trixie-security
  Affected
  nvd · python-aiohttp · debian · 13

Observed: Oct 27, 2026, 7:18:46 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]