PT-2026-49592 · Pypi · Aiohttp

Denyspakizh-Tob · CVE-2026-54278 · Published 2026-06-15 · Updated 2026-07-23

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions AIOHTTP versions prior to 3.14.1

Description During cleanup, a compressed request body can be decompressed into memory in a single chunk. An attacker may send a compressed payload in specific situations that could be decompressed into memory, potentially leading to a Denial of Service (DoS) via a zip bomb, which is a malicious archive designed to crash or freeze the system by expanding to an enormous size upon decompression.

Recommendations Update to version 3.14.1. Disable compression as a temporary workaround if an upgrade is not possible.

Exploit

Fix

DoS

Weakness Enumeration

CWE-409

Related Identifiers

CVE-2026-54278

ECHO-2791-8592-919C

GHSA-G3CQ-J2XW-WF74

OESA-2026-2838

OESA-2026-2839

OPENSUSE-SU-2026:21372-1

PYSEC-2026-2111

SUSE-SU-2026:22819-1

SUSE-SU-2026:3207-1

SUSE-SU-2026:3208-1

Affected Products

Aiohttp

References · 72

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54278.json · Exploit
• https://github.com/aio-libs/aiohttp/commit/4f7480e474cccc6a8cc2c92ad3f17a31dedf8232 · Patch
• https://cve.org/CVERecord?id=CVE-2026-54278 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-54277 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:22819-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-54278 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-54273 · Security Note
• https://osv.dev/vulnerability/PYSEC-2026-2111 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-54278 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-54280 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-54274 · Security Note
• https://osv.dev/vulnerability/GHSA-g3cq-j2xw-wf74 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-54278 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-APP-PYPI-CVE-2026-54278 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:3208-1 · Vendor Advisory