Critical severity9.1NVD Advisory· Published Feb 14, 2023· Updated Jun 17, 2026
CVE-2023-25725
CVE-2023-25725
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
21- osv-coords16 versionspkg:apk/chainguard/haproxypkg:apk/chainguard/haproxy-docpkg:apk/chainguard/haproxy-oci-entrypointpkg:apk/wolfi/haproxypkg:apk/wolfi/haproxy-docpkg:apk/wolfi/haproxy-oci-entrypointpkg:bitnami/haproxypkg:rpm/almalinux/haproxypkg:rpm/opensuse/haproxy&distro=openSUSE%20Leap%2015.4pkg:rpm/opensuse/haproxy&distro=openSUSE%20Leap%20Micro%205.3pkg:rpm/opensuse/haproxy&distro=openSUSE%20Tumbleweedpkg:rpm/suse/haproxy&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP1pkg:rpm/suse/haproxy&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP2pkg:rpm/suse/haproxy&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP3pkg:rpm/suse/haproxy&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP4pkg:rpm/suse/haproxy&distro=SUSE%20Linux%20Enterprise%20Micro%205.3
< 2.7.6-r0+ 15 more
- (no CPE)range: < 2.7.6-r0
- (no CPE)range: < 2.7.6-r0
- (no CPE)range: < 2.7.6-r0
- (no CPE)range: < 2.7.6-r0
- (no CPE)range: < 2.7.6-r0
- (no CPE)range: < 2.7.6-r0
- (no CPE)range: < 2.0.31
- (no CPE)range: < 2.4.17-3.el9_1.2
- (no CPE)range: < 2.4.8+git0.d1f8d41e0-150400.3.10.1
- (no CPE)range: < 2.4.8+git0.d1f8d41e0-150400.3.10.1
- (no CPE)range: < 2.7.3+git0.1065b1000-1.1
- (no CPE)range: < 2.0.31-150100.8.31.1
- (no CPE)range: < 2.0.31-150200.11.20.1
- (no CPE)range: < 2.0.31-150200.11.20.1
- (no CPE)range: < 2.4.8+git0.d1f8d41e0-150400.3.10.1
- (no CPE)range: < 2.4.8+git0.d1f8d41e0-150400.3.10.1
Patches
Vulnerability mechanics
References
6- lists.debian.org/debian-lts-announce/2023/02/msg00012.htmlnvdMailing ListThird Party Advisory
- www.debian.org/security/2023/dsa-5348nvdThird Party Advisory
- www.haproxy.orgnvdProduct
- git.haproxy.orgnvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FPTJQHKUEU2PQ7RWFUYAFLAD4STEIKHU/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JM5NCIBTHYDTLPY2UNC4HO2VAHHE6CJG/nvd
News mentions
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