InfraGuard

HAProxy 2.3 vulnerabilities

10 known CVEs affect the 2.3 line of HAProxy.

9.1 max CVSSSupport ended 2022-07-27

Fixed in

2.3.132.3.142.3.18
Check your versionhaproxy -v

CVEs affecting 2.3

CVE Title CVSS Exploited EPSS Published
CVE-2023-25725 HAProxy before 2.7.3 may allow a bypass of access control because HTTP/1 headers are inadvertently lost in som... 9.1 — 2023-02-14
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-2021-39240 An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It does not ens... 7.5 — 2021-08-18
CVE-2021-39242 An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It can lead to... 7.5 — 2021-08-18
CVE-2021-40346 An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform an HT... 7.5 — 2021-09-09
CVE-2022-0711 A flaw was found in the way HAProxy processed HTTP responses containing the "Set-Cookie2" header. This flaw co... 7.5 — 2022-03-03
CVE-2023-0836 An information leak vulnerability was discovered in HAProxy 2.1, 2.2 before 2.2.27, 2.3, 2.4 before 2.4.21, 2.... 7.5 — 2023-03-29
CVE-2021-39241 An issue was discovered in HAProxy 2.0 before 2.0.24, 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4... 5.3 — 2021-08-18

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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).