Allocation of Resources Without Limits or Throttling Affecting aiohttp package, versions [,3.14.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published4 Aug 2026
- disclosed3 Aug 2026
- credit4THêNē
Introduced: 3 Aug 2026
NewCVE-2026-59881 (opens in a new tab)How to fix?
Upgrade aiohttp to version 3.14.2 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the WebSocket client. An attacker can cause unexpected decompression of WebSocket frames by sending frames with the RSV1 bit set without proper negotiation, potentially leading to increased CPU or memory consumption.