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HAProxy 2.8 vulnerabilities

6 known CVEs affect the 2.8 line of HAProxy.

9.0 max CVSS

Fixed in

2.8.22.8.162.8.25
Check your versionhaproxy -v

CVEs affecting 2.8

CVE Title CVSS Exploited EPSS Published
CVE-2026-55203 HAProxy - Integer Overflow in FCGI Demux Record Length Field 9.0 — 2026-06-19
CVE-2026-55204 HAProxy - NULL Pointer Dereference in hpack_dht_insert Function 8.7 — 2026-06-19
CVE-2023-45539 HAProxy before 2.8.2 accepts # as part of the URI component, which might allow remote attackers to obtain sens... 8.2 — 2023-11-28
CVE-2025-11230 Denial of service vulnerability in HAProxy mjson library 7.5 — 2025-11-19
CVE-2023-40225 HAProxy through 2.0.32, 2.1.x and 2.2.x through 2.2.30, 2.3.x and 2.4.x through 2.4.23, 2.5.x and 2.6.x before... 7.2 — 2023-08-10
CVE-2026-33555 An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body lengt... 4.0 — 2026-04-13

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Data: CVE List (CVE® Program), NVD, CISA KEV, FIRST EPSS (see EPSS at https://www.first.org/epss), endoflife.date. Software list: awesome-selfhosted (CC BY-SA 3.0).