CVE-2019-19777
CVSS v3
8.8
HIGH
EPSS Score
1.4 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
stb_image.h (aka the stb image loader) 2.23, as used in libsixel and other products, has a heap-based buffer over-read in stbi__load_main.
Technical details
- Published
- 2019-12-13
Frequently asked questions
What is CVE-2019-19777?
stb_image.h (aka the stb image loader) 2.23, as used in libsixel and other products, has a heap-based buffer over-read in stbi__load_main.
Is CVE-2019-19777 actively exploited?
Active exploitation of CVE-2019-19777 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-2019-19777?
CVE-2019-19777 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2019-19777 affecting your environment?
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