Medium [CVE-2026-54278] Denial of Service due to excessive memory consumption from compressed request body
This medium-severity Red Hat Linux advisory covers CVE-2026-54278 affecting Exploit Intelligence, Migration Toolkit for Applications 8, OpenShift Lightspeed.
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Summary
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, during cleanup it is possible for a compressed request body to be decompressed into memory in one chunk.
An attacker may be able to send a compressed payload in specific situations that could be decompressed into memory, potentially leading to DoS (a zip bomb edge case). This vulnerability is fixed in 3.14.1.
This could potentially lead to a Denial of Service (DoS) condition, where the affected system becomes unresponsive or unavailable. Exploitation requires aiohttp deployed as a network-facing HTTP server that accepts compressed request bodies.
Many Red Hat products ship aiohttp as a bundled dependency for client libraries, internal automation, or services that do not expose this server path to untrusted users. In those configurations, practical risk may be lower, but affected packages should still be updated to aiohttp 3.14.1 or later when fixes are released.
Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-409.
Affected products named by the advisory: Exploit Intelligence; Migration Toolkit for Applications 8; OpenShift Lightspeed; Red Hat AI Inference Server; and 6 more.
- < 3.14.1
Official advisory · high-confidence parse· fetched 15 days ago·verify at source
Mitigation checklist
- Update the aiohttp package to version 3.14.1 or later. Until updated builds are available, reduce exposure by not exposing aiohttp-based HTTP servers directly to untrusted networks. As a workaround, disable HTTP request body compression on aiohttp servers if unable to upgrade immediately. Installations that use aiohttp only as an HTTP client are not affected by this flaw.
Official advisory · high-confidence parse· fetched 15 days ago·verify at source
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