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.

CVSS v3 8.8 HIGH
CVSS v2.0 6.8 MEDIUM

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:P

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/saitoha/libsixel/issues/109	Exploit Third Party Advisory
https://github.com/saitoha/libsixel/issues/109	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:nothings:stb_image.h:2.23:::::::*
	cpe:2.3:a:saitoha:libsixel:1.8.2:::::::*

History

24 Apr 2026, 12:56

Type	Values Removed	Values Added
First Time		Saitoha Saitoha libsixel
CPE	cpe:2.3:a:libsixel_project:libsixel:1.8.2:::::::*	cpe:2.3:a:saitoha:libsixel:1.8.2:::::::*

21 Nov 2024, 04:35

Type	Values Removed	Values Added
References	~~() https://github.com/saitoha/libsixel/issues/109 - Exploit, Third Party Advisory~~	() https://github.com/saitoha/libsixel/issues/109 - Exploit, Third Party Advisory

Information

Published : 2019-12-13 02:15

Updated : 2026-04-24 12:56

NVD link : CVE-2019-19777

Mitre link : CVE-2019-19777

CVE.ORG link : CVE-2019-19777

JSON object : View

Products Affected

saitoha

libsixel

nothings

stb_image.h

CWE

CWE-125

Out-of-bounds Read

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