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HAProxy

Records43All Threatist records
Exploited (KEV)0None in CISA KEV
CVSS critical4CVSS 9.0–10.0
CVSS high24CVSS 7.0–8.9

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HAProxy records in CISA KEV

No HAProxy vulnerabilities are listed in CISA KEV.

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Records

43 records

Priority HIGH 73

In hpack_dht_insert in hpack-tbl.c in the HPACK decoder in HAProxy 1.8 through 2.x before 2.1.4, a remote attacker can write arbitrary bytes around a certain location on the heap via a crafted HTTP/2 request, possibly ca…

CVSS 3.1HIGH 8.8 Network Low privileges No interaction EPSS 0.61593 Published 2020-04-02 Fixed CWE-787
Priority MEDIUM 61

HAproxy 1.6.x before 1.6.6, when a deny comes from a reqdeny rule, allows remote attackers to cause a denial of service (uninitialized memory access and crash) or possibly have unspecified other impact via unknown vector…

CVSS 3.0HIGH 7.5 Network No auth No interaction EPSS 0.4282 Published 2016-06-30 No fix listed CWE-119
Priority MEDIUM 54

HAProxy before 2.7.3 may allow a bypass of access control because HTTP/1 headers are inadvertently lost in some situations, aka "request smuggling." The HTTP header parsers in HAProxy may accept empty header field names,…

CVSS 3.1CRITICAL 9.1 Network No auth No interaction EPSS 0.05493 Published 2023-02-14 Partial fix CWE-444
TI-2022-00625 CVE-2022-0711 · GHSA-x4fc-x944-v9p7

Infinite loop in haproxy

Priority MEDIUM 50

A flaw was found in the way HAProxy processed HTTP responses containing the "Set-Cookie2" header.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.16563 Published 2022-03-02 Fixed CWE-835
Priority MEDIUM 49

In HAProxy Data Plane API 2.2.0 through 3.4.3 (and corresponding Enterprise Edition releases), Server.ConfigureAPI() has process-global authentication logic that improperly drops security controls across multiple transpo…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00355 Published 2026-10-12 No fix listed CWE-306
Priority MEDIUM 44

HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c that fails to validate the return value of hpack_dht_defrag() when the memory…

CVSS 4.0HIGH 8.7 Network No auth No interaction EPSS 0.00484 Published 2026-06-18 Partial fix CWE-476
TI-2023-00792 CVE-2023-0836 · GHSA-xhfw-qhxr-hjhq

Information disclosure in HAProxy

Priority MEDIUM 41

An information leak vulnerability was discovered in HAProxy 2.1, 2.2 before 2.2.27, 2.3, 2.4 before 2.4.21, 2.5 before 2.5.11, 2.6 before 2.6.8, 2.7 before 2.7.1.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.01201 Published 2023-03-29 Partial fix CWE-200
Priority MEDIUM 40

HAProxy 3 before 3.4.6 allows a remote unauthenticated attacker to cause a denial of service (persistent worker-thread CPU exhaustion) via an HTTP/1.1 chunked request.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00807 Published 2026-10-22 Partial fix · 3.0.30, 3.2.26 +10 CWE-835
Priority MEDIUM 40

HAProxy 3.2 before 3.4.6 allows a remote unauthenticated attacker to cause a denial of service (worker-thread CPU exhaustion) via a truncated HTTP/2 PING frame.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00738 Published 2026-10-22 Partial fix · 3.2.26, 3.3.17 +8 CWE-252
Priority MEDIUM 40

Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially crafted JSON requests.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.0074 Published 2025-11-19 Partial fix · 2.4.30, 2.6.23 +4 CWE-407
Priority MEDIUM 40

headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the mastercactapus caddy-proxyprotocol plugin through 0.0.2 for Caddy, allows remote attackers to cause a denial of service (webserver panic and daemon…

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.04295 Published 2019-07-23 Fixed in 0.0.2 CWE-20
Priority LOW 39

HAProxy through 3.4.0, fixed in commit 5985276, contains an integer overflow vulnerability in the fcgi_conn structure's drl field that allows buffer misparse as new FCGI record headers.

CVSS 4.0CRITICAL 9.0 Network No auth No interaction EPSS 0.00334 Published 2026-06-18 Partial fix CWE-190
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