Vulnerabilities (CVE)

Filtered by vendor Haproxy Subscribe
Total 35 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2019-14241 1 Haproxy 1 Haproxy 2026-06-17 5.0 MEDIUM 7.5 HIGH
HAProxy through 2.0.2 allows attackers to cause a denial of service (ha_panic) via vectors related to htx_manage_client_side_cookies in proto_htx.c.
CVE-2019-11323 1 Haproxy 1 Haproxy 2026-06-17 4.3 MEDIUM 5.9 MEDIUM
HAProxy before 1.9.7 mishandles a reload with rotated keys, which triggers use of uninitialized, and very predictable, HMAC keys. This is related to an include/types/ssl_sock.h error.
CVE-2018-20615 4 Canonical, Haproxy, Opensuse and 1 more 5 Ubuntu Linux, Haproxy, Leap and 2 more 2026-06-17 5.0 MEDIUM 7.5 HIGH
An out-of-bounds read issue was discovered in the HTTP/2 protocol decoder in HAProxy 1.8.x and 1.9.x through 1.9.0 which can result in a crash. The processing of the PRIORITY flag in a HEADERS frame requires 5 extra bytes, and while these bytes are skipped, the total frame length was not re-checked to make sure they were present in the frame.
CVE-2018-20103 3 Canonical, Haproxy, Redhat 3 Ubuntu Linux, Haproxy, Openshift Container Platform 2026-06-17 5.0 MEDIUM 7.5 HIGH
An issue was discovered in dns.c in HAProxy through 1.8.14. In the case of a compressed pointer, a crafted packet can trigger infinite recursion by making the pointer point to itself, or create a long chain of valid pointers resulting in stack exhaustion.
CVE-2018-20102 3 Canonical, Haproxy, Redhat 3 Ubuntu Linux, Haproxy, Openshift Container Platform 2026-06-17 5.0 MEDIUM 7.5 HIGH
An out-of-bounds read in dns_validate_dns_response in dns.c was discovered in HAProxy through 1.8.14. Due to a missing check when validating DNS responses, remote attackers might be able read the 16 bytes corresponding to an AAAA record from the non-initialized part of the buffer, possibly accessing anything that was left on the stack, or even past the end of the 8193-byte buffer, depending on the value of accepted_payload_size.
CVE-2018-14645 3 Canonical, Haproxy, Redhat 5 Ubuntu Linux, Haproxy, Enterprise Linux and 2 more 2026-06-17 5.0 MEDIUM 7.5 HIGH
A flaw was discovered in the HPACK decoder of HAProxy, before 1.8.14, that is used for HTTP/2. An out-of-bounds read access in hpack_valid_idx() resulted in a remote crash and denial of service.
CVE-2018-11469 2 Canonical, Haproxy 2 Ubuntu Linux, Haproxy 2026-06-17 4.3 MEDIUM 5.9 MEDIUM
Incorrect caching of responses to requests including an Authorization header in HAProxy 1.8.0 through 1.8.9 (if cache enabled) allows attackers to achieve information disclosure via an unauthenticated remote request, related to the proto_http.c check_request_for_cacheability function.
CVE-2018-10184 2 Haproxy, Redhat 2 Haproxy, Enterprise Linux 2026-06-17 5.0 MEDIUM 7.5 HIGH
An issue was discovered in HAProxy before 1.8.8. The incoming H2 frame length was checked against the max_frame_size setting instead of being checked against the bufsize. The max_frame_size only applies to outgoing traffic and not to incoming, so if a large enough frame size is advertised in the SETTINGS frame, a wrapped frame will be defragmented into a temporary allocated buffer where the second fragment may overflow the heap by up to 16 kB. It is very unlikely that this can be exploited for code execution given that buffers are very short lived and their addresses not realistically predictable in production, but the likelihood of an immediate crash is absolutely certain.
CVE-2016-5360 2 Canonical, Haproxy 2 Ubuntu Linux, Haproxy 2026-06-17 5.0 MEDIUM 7.5 HIGH
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 vectors.
CVE-2016-2102 1 Haproxy 1 Haproxy 2026-06-17 5.0 MEDIUM 5.3 MEDIUM
HAProxy statistics in openstack-tripleo-image-elements are non-authenticated over the network.
CVE-2015-3281 6 Canonical, Debian, Haproxy and 3 more 12 Ubuntu Linux, Debian Linux, Haproxy and 9 more 2026-06-17 5.0 MEDIUM N/A
The buffer_slow_realign function in HAProxy 1.5.x before 1.5.14 and 1.6-dev does not properly realign a buffer that is used for pending outgoing data, which allows remote attackers to obtain sensitive information (uninitialized memory contents of previous requests) via a crafted request.
CVE-2014-6269 1 Haproxy 1 Haproxy 2026-06-17 5.0 MEDIUM N/A
Multiple integer overflows in the http_request_forward_body function in proto_http.c in HAProxy 1.5-dev23 before 1.5.4 allow remote attackers to cause a denial of service (crash) via a large stream of data, which triggers a buffer overflow and an out-of-bounds read.
CVE-2013-2175 4 Canonical, Debian, Haproxy and 1 more 4 Ubuntu Linux, Debian Linux, Haproxy and 1 more 2026-06-16 5.0 MEDIUM N/A
HAProxy 1.4 before 1.4.24 and 1.5 before 1.5-dev19, when configured to use hdr_ip or other "hdr_*" functions with a negative occurrence count, allows remote attackers to cause a denial of service (negative array index usage and crash) via an HTTP header with a certain number of values, related to the MAX_HDR_HISTORY variable.
CVE-2013-1912 1 Haproxy 1 Haproxy 2026-06-16 5.1 MEDIUM N/A
Buffer overflow in HAProxy 1.4 through 1.4.22 and 1.5-dev through 1.5-dev17, when HTTP keep-alive is enabled, using HTTP keywords in TCP inspection rules, and running with rewrite rules that appends to requests, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via crafted pipelined HTTP requests that prevent request realignment from occurring.
CVE-2012-2942 1 Haproxy 1 Haproxy 2026-06-16 5.1 MEDIUM N/A
Buffer overflow in the trash buffer in the header capture functionality in HAProxy before 1.4.21, when global.tune.bufsize is set to a value greater than the default and header rewriting is enabled, allows remote attackers to cause a denial of service and possibly execute arbitrary code via unspecified vectors.