CVE-2020-35963
CVSS v3
7.8
HIGH
EPSS Score
1.3 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
flb_gzip_compress in flb_gzip.c in Fluent Bit before 1.6.4 has an out-of-bounds write because it does not use the correct calculation of the maximum gzip data-size expansion.
Technical details
- Published
- 2021-01-03
Frequently asked questions
What is CVE-2020-35963?
flb_gzip_compress in flb_gzip.c in Fluent Bit before 1.6.4 has an out-of-bounds write because it does not use the correct calculation of the maximum gzip data-size expansion.
Is CVE-2020-35963 actively exploited?
Active exploitation of CVE-2020-35963 has not been confirmed. Its EPSS score was 1.3% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-35963?
CVE-2020-35963 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2020-35963 affecting your environment?
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