CVE-2021-36088
CVSS v3
9.8
CRITICAL
EPSS Score
2.4 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flb_free (called from flb_parser_json_do and flb_parser_do).
Technical details
- Published
- 2021-07-01
Frequently asked questions
What is CVE-2021-36088?
Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flb_free (called from flb_parser_json_do and flb_parser_do).
Is CVE-2021-36088 actively exploited?
Active exploitation of CVE-2021-36088 has not been confirmed. Its EPSS score was 2.4% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-36088?
CVE-2021-36088 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-36088 affecting your environment?
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