Haproxy
by Haproxy
Source repositories
CVEs (39)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2020-35195 | Cri | 0.64 | 9.8 | 0.02 | Dec 17, 2020 | The official haproxy docker images before 1.8.18-alpine (Alpine specific) contain a blank password for a root user. System using the haproxy docker container deployed by affected versions of the docker image may allow a remote attacker to achieve root access with a blank… | ||
| CVE-2019-19330 | Cri | 0.64 | 9.8 | 0.04 | Nov 27, 2019 | The HTTP/2 implementation in HAProxy before 2.0.10 mishandles headers, as demonstrated by carriage return (CR, ASCII 0xd), line feed (LF, ASCII 0xa), and the zero character (NUL, ASCII 0x0), aka Intermediary Encapsulation Attacks. | ||
| CVE-2020-11100 | Hig | 0.62 | 8.8 | 0.61 | Apr 2, 2020 | 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 causing remote code execution. | ||
| CVE-2023-25725 | Cri | 0.60 | 9.1 | 0.05 | Feb 14, 2023 | 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… | ||
| CVE-2019-14241 | Hig | 0.54 | 7.5 | 0.70 | Jul 23, 2019 | 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-2023-45539 | Hig | 0.53 | 8.2 | 0.02 | Nov 28, 2023 | 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. | ||
| CVE-2016-5360 | Hig | 0.52 | 7.5 | 0.43 | Jun 30, 2016 | 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-2025-11230 | Hig | 0.49 | 7.5 | 0.01 | Nov 19, 2025 | Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially crafted JSON requests. | ||
| CVE-2024-45506 | Hig | 0.49 | 7.5 | 0.01 | Sep 4, 2024 | HAProxy 2.9.x before 2.9.10, 3.0.x before 3.0.4, and 3.1.x through 3.1-dev6 allows a remote denial of service for HTTP/2 zero-copy forwarding (h2_send loop) under a certain set of conditions, as exploited in the wild in 2024. | ||
| CVE-2023-0836 | Hig | 0.49 | 7.5 | 0.01 | Mar 29, 2023 | 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… | ||
| CVE-2021-39242 | Hig | 0.49 | 7.5 | 0.02 | Aug 17, 2021 | 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 a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority is mishandled. | ||
| CVE-2021-39240 | Hig | 0.49 | 7.5 | 0.02 | Aug 17, 2021 | 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 ensure that the scheme and path portions of a URI have the expected characters. For example, the authority field (as observed on a target HTTP/2 server) might differ from… | ||
| CVE-2018-20615 | Hig | 0.49 | 7.5 | 0.04 | Mar 21, 2019 | 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… | ||
| CVE-2018-20103 | Hig | 0.49 | 7.5 | 0.07 | Dec 12, 2018 | 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 | Hig | 0.49 | 7.5 | 0.04 | Dec 12, 2018 | 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… | ||
| CVE-2018-14645 | Hig | 0.49 | 7.5 | 0.03 | Sep 21, 2018 | 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-2018-10184 | Hig | 0.49 | 7.5 | 0.08 | May 9, 2018 | 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… | ||
| CVE-2023-25950 | Hig | 0.48 | 7.3 | 0.03 | Apr 11, 2023 | 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. | ||
| CVE-2019-18277 | Hig | 0.43 | 7.5 | 0.10 | Oct 23, 2019 | A flaw was found in HAProxy before 2.0.6. In legacy mode, messages featuring a transfer-encoding header missing the "chunked" value were not being correctly rejected. The impact was limited but if combined with the "http-reuse always" setting, it could be used to help construct… | ||
| CVE-2026-55204 | Hig | 0.42 | 7.5 | 0.00 | Jun 18, 2026 | 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… |
- risk 0.64cvss 9.8epss 0.02
The official haproxy docker images before 1.8.18-alpine (Alpine specific) contain a blank password for a root user. System using the haproxy docker container deployed by affected versions of the docker image may allow a remote attacker to achieve root access with a blank…
- risk 0.64cvss 9.8epss 0.04
The HTTP/2 implementation in HAProxy before 2.0.10 mishandles headers, as demonstrated by carriage return (CR, ASCII 0xd), line feed (LF, ASCII 0xa), and the zero character (NUL, ASCII 0x0), aka Intermediary Encapsulation Attacks.
- risk 0.62cvss 8.8epss 0.61
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 causing remote code execution.
- risk 0.60cvss 9.1epss 0.05
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…
- risk 0.54cvss 7.5epss 0.70
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.
- risk 0.53cvss 8.2epss 0.02
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.
- risk 0.52cvss 7.5epss 0.43
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.
- risk 0.49cvss 7.5epss 0.01
Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially crafted JSON requests.
- risk 0.49cvss 7.5epss 0.01
HAProxy 2.9.x before 2.9.10, 3.0.x before 3.0.4, and 3.1.x through 3.1-dev6 allows a remote denial of service for HTTP/2 zero-copy forwarding (h2_send loop) under a certain set of conditions, as exploited in the wild in 2024.
- risk 0.49cvss 7.5epss 0.01
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…
- risk 0.49cvss 7.5epss 0.02
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 a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority is mishandled.
- risk 0.49cvss 7.5epss 0.02
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 ensure that the scheme and path portions of a URI have the expected characters. For example, the authority field (as observed on a target HTTP/2 server) might differ from…
- risk 0.49cvss 7.5epss 0.04
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…
- risk 0.49cvss 7.5epss 0.07
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.
- risk 0.49cvss 7.5epss 0.04
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…
- risk 0.49cvss 7.5epss 0.03
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.
- risk 0.49cvss 7.5epss 0.08
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…
- risk 0.48cvss 7.3epss 0.03
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.
- risk 0.43cvss 7.5epss 0.10
A flaw was found in HAProxy before 2.0.6. In legacy mode, messages featuring a transfer-encoding header missing the "chunked" value were not being correctly rejected. The impact was limited but if combined with the "http-reuse always" setting, it could be used to help construct…
- risk 0.42cvss 7.5epss 0.00
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…
Page 1 of 2