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Vulnérabilités de haproxy

Vulnérabilités publiées pour haproxy au cours des 30 derniers jours : 1. Présentes dans le catalogue KEV : 0.

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Vulnérabilités : 38

  1. CVE-2026-110353

    Élevée · CVSS 7.5EPSS 0,68%Correctif disponible

    CVE-2026-110353

    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. h2c_handle_ping in src/mux_h2.c does not check for a short read, unlike the other H2 frame handlers. Because the incomplete frame cannot be processed, its data is never consumed, and the H2 multiplexer tasklet is repeatedly woken by that pending data without making progress. The CPU spins until timeout http-request closes the connection, and an attacker opening many such connections can sustain high CPU usage.

    haproxySystèmes d’exploitation Serveurs web
    • Mettez à jour vers 3.2.26-1
    Publication Mise à jour
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  4. CVE-2026-55204

    Élevée · CVSS 8.7EPSS 0,48%Correctif disponible

    HAProxy - NULL Pointer Dereference in hpack_dht_insert Function

    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 pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memory pressure to dereference a NULL pointer and crash HAProxy worker processes, causing denial of service.

    haproxySystèmes d’exploitation Serveurs web
    • Mettez à jour vers 3.2.20-1
    Publication Mise à jour
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  5. CVE-2026-55203

    Critique · CVSS 9EPSS 0,33%Correctif disponible

    HAProxy - Integer Overflow in FCGI Demux Record Length Field

    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. When contentLength is 65535 and paddingLength is 1 or more, the drl field wraps to 0, causing incorrect record consumption and allowing malicious FastCGI backends to desynchronize the FCGI framing parser, potentially causing request routing errors, response smuggling, or memory safety issues.

    haproxySystèmes d’exploitation Serveurs web
    • Mettez à jour vers 3.2.20-1
    Publication Mise à jour
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  6. CVE-2026-33555

    Moyenne · CVSS 4EPSS 0,6%Correctif disponible

    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 and could be used for request smuggling. The earliest affected version is 2.6.

    haproxySystèmes d’exploitation Serveurs web
    • Mettez à jour vers 3.2.15-1
    Publication Mise à jour
    Avis original 1 ↗Avis original 2 ↗Avis original 3 ↗

  9. CVE-2024-53008

    Moyenne · CVSS 5.3EPSS 1,02%Correctif disponible

    CVE-2024-53008

    Inconsistent interpretation of HTTP requests ('HTTP Request/Response Smuggling') issue exists in HAProxy. If this vulnerability is exploited, a remote attacker may access a path that is restricted by ACL (Access Control List) set on the product. As a result, the attacker may obtain sensitive information.

    haproxySystèmes d’exploitation Serveurs web
    • Mettez à jour vers 2.9.10-1
    Publication Mise à jour
    Avis original 1 ↗Avis original 2 ↗Avis original 3 ↗

  12. CVE-2023-45539

    Élevée · CVSS 8.2EPSS 1,51%Correctif disponible

    CVE-2023-45539

    HAProxy before 2.8.2 accepts # as part of the URI component, which might allow remote attackers to obtain sensitive information or have unspecified other impact upon misinterpretation of a path_end rule, such as routing index.html#.png to a static server.

    haproxySystèmes d’exploitation Serveurs web
    • Mettez à jour vers 2.6.15-1
    Publication Mise à jour
    Avis original 1 ↗Avis original 2 ↗Avis original 3 ↗

  13. CVE-2023-44487

    Élevée · CVSS 7.5EPSS 100%Dans le catalogue KEVCode d’exploitation publicCorrectif disponible

    CVE-2023-44487

    The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

    haproxySystèmes d’exploitation Serveurs web
    • Mettez à jour vers 1.8.13-1
    Publication Mise à jour
    Avis original 1 ↗Avis original 2 ↗Avis original 3 ↗

  14. CVE-2023-40225

    Élevée · CVSS 7.2EPSS 2,15%Correctif disponible

    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 2.6.15, 2.7.x before 2.7.10, and 2.8.x before 2.8.2 forwards empty Content-Length headers, violating RFC 9110 section 8.6. In uncommon cases, an HTTP/1 server behind HAProxy may interpret the payload as an extra request.

    haproxySystèmes d’exploitation Serveurs web
    • Mettez à jour vers 2.6.15-1
    Publication Mise à jour
    Avis original 1 ↗Avis original 2 ↗Avis original 3 ↗

  15. CVE-2023-25950

    Élevée · CVSS 7.3EPSS 2,97%Correctif disponible

    CVE-2023-25950

    HTTP request/response smuggling vulnerability in HAProxy version 2.7.0, and 2.6.1 to 2.6.7 allows a remote attacker to alter a legitimate user's request. As a result, the attacker may obtain sensitive information or cause a denial-of-service (DoS) condition.

    haproxySystèmes d’exploitation Serveurs web
    • Mettez à jour vers 2.6.8-1
    Publication Mise à jour
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  16. CVE-2023-0836

    Élevée · CVSS 7.5EPSS 1,2%Correctif disponible

    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, 2.5 before 2.5.11, 2.6 before 2.6.8, 2.7 before 2.7.1. There are 5 bytes left uninitialized in the connection buffer when encoding the FCGI_BEGIN_REQUEST record. Sensitive data may be disclosed to configured FastCGI backends in an unexpected way.

    haproxySystèmes d’exploitation Serveurs web
    • Mettez à jour vers 2.6.8-1
    Publication Mise à jour
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  17. CVE-2023-0056

    Moyenne · CVSS 6.5EPSS 1,83%Correctif disponible

    CVE-2023-0056

    An uncontrolled resource consumption vulnerability was discovered in HAProxy which could crash the service. This issue could allow an authenticated remote attacker to run a specially crafted malicious server in an OpenShift cluster. The biggest impact is to availability.

    haproxySystèmes d’exploitation Serveurs web
    • Mettez à jour vers 2.6.8-1
    Publication Mise à jour
    Avis original 1 ↗Avis original 2 ↗

  18. CVE-2023-25725

    Critique · CVSS 9.1EPSS 5,45%Correctif disponible

    CVE-2023-25725

    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, which could be used to truncate the list of HTTP headers and thus make some headers disappear after being parsed and processed for HTTP/1.0 and HTTP/1.1. For HTTP/2 and HTTP/3, the impact is limited because the headers disappear before being parsed and processed, as if they had not been sent by the client. The fixed versions are 2.7.3, 2.6.9, 2.5.12, 2.4.22, 2.2.29, and 2.0.31.

    haproxySystèmes d’exploitation Serveurs web
    • Mettez à jour vers 2.6.8-2
    Publication Mise à jour
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  19. CVE-2022-0711

    Élevée · CVSS 7.5EPSS 16,56%Correctif disponible

    CVE-2022-0711

    A flaw was found in the way HAProxy processed HTTP responses containing the "Set-Cookie2" header. This flaw could allow an attacker to send crafted HTTP response packets which lead to an infinite loop, eventually resulting in a denial of service condition. The highest threat from this vulnerability is availability.

    haproxySystèmes d’exploitation Serveurs web
    • Mettez à jour vers 2.4.13-1
    Publication Mise à jour
    Avis original 1 ↗Avis original 2 ↗Avis original 3 ↗

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