cve.bz

CVE-2021-39242

7.5 highEPSS 2.2%

High (7.5). EPSS 2.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
2.2% chance of exploitation in the next 30 days; higher than 82% of CVEs (scores of 2026-10-31)
CWE
CWE-755
Published
Modified
Record from
the NVD, synced

Affected

References

Check your stackJSON