Medium severity6.5NVD Advisory· Published Aug 10, 2021· Updated Apr 24, 2026
CVE-2020-21677
CVE-2020-21677
Description
A heap-based buffer overflow in the sixel_encoder_output_without_macro function in encoder.c of Libsixel 1.8.4 allows attackers to cause a denial of service (DOS) via converting a crafted PNG file into Sixel format.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1- github.com/saitoha/libsixel/issues/123nvdExploitIssue TrackingPatchThird Party Advisory
News mentions
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