ALPINE-CVE-2021-33193

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2021-33193
Published: 16 Aug 2021, 08:15
Last modified:03 Dec 2025, 22:44

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
3.1 (osv_alpine)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

16 Aug 2021, 08:15
Published
Vulnerability first disclosed
03 Dec 2025, 22:44
Last Modified
Vulnerability information updated

Description

A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Systems

  • alpine•apache2

    < 2.4.49-r0 | < 2.4.49-r0 | < 2.4.49-r0 | < 2.4.49-r0 | < 2.4.49-r0 | < 2.4.49-r0 | < 2.4.49-r0 | < 2.4.49-r0 | < 2.4.49-r0 | < 2.4.49-r0 | < 2.4.49-r0 | < 2.4.49-r0 | < 2.4.49-r0

References (1)