Allocation of Resources Without Limits or Throttling Affecting openssl package, versions [3.4.0,3.4.8)[3.5.0,3.5.9)[3.6.0,3.6.5)[4.0.1,4.0.3)
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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- published6 Oct 2026
- disclosed29 Sept 2026
- creditMoltenbit,Bhabani Sankar Das,Saiyowa Security Team, mzfr
Introduced: 29 Sep 2026
NewCVE-2026-75804 (opens in a new tab)How to fix?
Upgrade openssl to version 3.4.8, 3.5.9, 3.6.5, 4.0.3 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the QUIC flow control enforcement, which applies the stream level window but not the connection level one. An attacker can force roughly 100 MB of allocation against a default 768 KB connection window, by opening streams up to the permitted count and sending bytes at offset zero on each. This requires an established QUIC connection, and the ceiling is twice the maximum stream count times the per stream limit.