An issue was discovered in libsixel 1.8.4.

published 2019-12-30 6y ago modified 2026-06-17 4mo ago also EUVD-2019-10650

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 64%
public exploits: 0; none known

An issue was discovered in libsixel 1.8.4. There is a heap-based buffer overflow in the function gif_init_frame at fromgif.c.

Patch / fix

distros 1

libsixel Debian 14, Debian 13, Debian 12 1.8.6-1

debian advisories DEBIAN-CVE-2019-20094

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Exploit prediction

1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

github.com https://github.com/saitoha/libsixel/issues/125 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

CWE-787 Out-of-bounds Write

References

github.com /saitoha/libsixel/issues/125
exploit, issue-tracking, third-party-advisory

Sources

CVE List CVE-2019-20094
NVD CVE-2019-20094

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