PT-2026-29607 · Aiohttp · Aiohttp

Uug4Na · Published 2026-04-01 · Updated 2026-05-18 · CVE-2026-34518

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions AIOHTTP versions prior to 3.13.4

Description When following redirects to a different origin, aiohttp removes the Authorization header while keeping the Cookie and Proxy-Authorization headers. This could lead to the leakage of sensitive information contained in the Cookie and Proxy-Authorization headers to an unintended party.

Recommendations Update to AIOHTTP version 3.13.4 or later.

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CLEANSTART-2026-AN27706

CVE-2026-34518

ECHO-758D-EDBE-6881

GHSA-966J-VMVW-G2G9

OESA-2026-2192

OESA-2026-2193

OESA-2026-2194

Affected Products

Aiohttp

References · 62

• https://github.com/aio-libs/aiohttp/security/advisories/GHSA-966j-vmvw-g2g9 · Vendor Advisory
• https://github.com/aio-libs/aiohttp/commit/5351c980dcec7ad385730efdf4e1f4338b24fdb6 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-34514 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-34518 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2194 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-30922 · Security Note
• https://osv.dev/vulnerability/ROOT-APP-PYPI-CVE-2026-34518 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34517 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-44431 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-34516 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-34513 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-34518 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34073 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-44432 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-33175 · Security Note