VDB
BIT-haproxy-2021-40346
BIT-haproxy-2021-40346
PUBLISHED
CVSS 7.5 HIGH
An integer overflow exists in HAProxy 2.0 through 2.5 in htx_add_header that can be exploited to perform an HTTP request smuggling attack, allowing an attacker to bypass all configured http-request HAProxy ACLs and possibly other ACLs.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bitnami | haproxy | 2.0.0, 2.2.0, 2.3.0 |
Timeline
- Mar 6, 2024 CVE Published
- Apr 3, 2025 CVE Updated
- Apr 30, 2026 Distribution Patch
References
- https://git.haproxy.org/?p=haproxy.git url
- https://github.com/haproxy/haproxy/commit/3b69886f7dcc3cfb3d166309018e6cfec9ce2c95 url
- https://jfrog.com/blog/critical-vulnerability-in-haproxy-cve-2021-40346-integer-overflow-enables-http-smuggling/ url
- https://lists.apache.org/thread.html/r284567dd7523f5823e2ce995f787ccd37b1cc4108779c50a97c79120%40%3Cdev.cloudstack.apache.org%3E url
- https://lists.apache.org/thread.html/r8a58fd7a29808e5d27ee56877745e58dc4bb041b9af94601554e2a5a%40%3Cdev.cloudstack.apache.org%3E url
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A7V2IYO22LWVBGUNZWVKNTMDV4KINLFO/ url
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MXTSBY2TEAXWZVFQM3CXHJFRONX7PEMN/ url
- https://www.debian.org/security/2021/dsa-4968 url
- https://www.mail-archive.com/haproxy%40formilux.org url
- https://www.mail-archive.com/haproxy%40formilux.org/msg41114.html url
- https://nvd.nist.gov/vuln/detail/CVE-2021-40346 url