CVE-2023-4853
CVSS v3
8.1
HIGH
EPSS Score
1.4 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A flaw was found in Quarkus where HTTP security policies are not sanitizing certain character permutations correctly when accepting requests, resulting in incorrect evaluation of permissions. This issue could allow an attacker to bypass the security policy altogether, resulting in unauthorized endpoint access and possibly a denial of service.
Technical details
- Published
- 2023-09-20
Frequently asked questions
What is CVE-2023-4853?
A flaw was found in Quarkus where HTTP security policies are not sanitizing certain character permutations correctly when accepting requests, resulting in incorrect evaluation of permissions. This issue could allow an attacker to bypass the security policy altogether, resulting in unauthorized endpoint access and possibly a denial of service.
Is CVE-2023-4853 actively exploited?
Active exploitation of CVE-2023-4853 has not been confirmed. Its EPSS score was 1.4% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2023-4853?
CVE-2023-4853 has a CVSS v3 base score of 8.1 (HIGH severity).
Is CVE-2023-4853 affecting your environment?
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