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6 vulnerabilities found for HAProxy by HAProxy
CVE-2026-26080 (GCVE-0-2026-26080)
Vulnerability from cvelistv5
Published
2026-07-20 00:00
Modified
2026-07-20 18:16
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-252 - Unchecked Return Value
Summary
HAProxy Community Edition 3.2.x through 3.3.x before 3.3.3 can enter a loop or crash because varint is mishandled. HAProxy Enterprise and ALOHA are also affected.
References
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CVE-2026-26081 (GCVE-0-2026-26081)
Vulnerability from cvelistv5
Published
2026-07-20 00:00
Modified
2026-07-20 18:18
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-130 - Improper Handling of Length Parameter Inconsistency
Summary
HAProxy Community Edition 3.0 through 3.3 before 3.3.3 lacks a length check for the NEW_TOKEN format. HAProxy Enterprise and ALOHA are also affected.
References
Impacted products
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CVE-2026-55204 (GCVE-0-2026-55204)
Vulnerability from cvelistv5
Published
2026-06-18 16:05
Modified
2026-07-14 21:33
Severity ?
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
VLAI Severity ?
EPSS score ?
CWE
- CWE-476 - NULL Pointer Dereference
Summary
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.
References
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CVE-2026-55203 (GCVE-0-2026-55203)
Vulnerability from cvelistv5
Published
2026-06-18 16:05
Modified
2026-07-14 21:33
Severity ?
9.0 (Critical) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/SA:N
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N
VLAI Severity ?
EPSS score ?
CWE
- CWE-190 - Integer Overflow or Wraparound
Summary
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.
References
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CVE-2026-33555 (GCVE-0-2026-33555)
Vulnerability from cvelistv5
Published
2026-04-13 00:00
Modified
2026-04-22 18:43
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-130 - Improper Handling of Length Parameter Inconsistency
Summary
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.
References
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CVE-2025-32464 (GCVE-0-2025-32464)
Vulnerability from cvelistv5
Published
2025-04-09 00:00
Modified
2025-04-23 22:03
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-1025 - Comparison Using Wrong Factors
Summary
HAProxy 2.2 through 3.1.6, in certain uncommon configurations, has a sample_conv_regsub heap-based buffer overflow because of mishandling of the replacement of multiple short patterns with a longer one.
References
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