CVSS v3
7.5
HIGH
EPSS Score
93.0%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
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.
Active exploitation of CVE-2021-40346 has not been confirmed. The EPSS score is 93.0%, indicating the estimated probability of exploitation in the next 30 days.
CVE-2021-40346 has a CVSS v3 base score of 7.5 (HIGH severity).
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Ranked by exploit probability (EPSS).