CVE-2026-33555 — HAProxy Vulnerability
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CVE-2026-33555 — An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches a previously announced content-length when the stream is closed via a frame with an empty payload. This can cause desynchronization issues with the backend server
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-33555 | vulnerability | CVE-2026-33555 |
| CWE-130 | weakness | CWE-130 |
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 13, 2026 at 20:16 UTC |
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