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    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.

    Published:Dec 13, 2019
    Last Modified:Apr 24, 2026
    EPS:Dec 13, 2019
    EPSS Score:0.0037
    CVSS Score:8.8

    Affected Products

    Vendor
    Nothings
    Product
    Stb Image.h
    Vendor
    Saitoha
    Product
    Libsixel

    Exploits

    https://github.com/saitoha/libsixel/issues/109https://github.com/saitoha/libsixel/issues/109

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

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    CVE-2025-3407 (CVSS 5.3) — A vulnerability was found in Nothings stb up to f056911. It has been declared as critical. Affected by this vu…
    CVE-2025-3406 (CVSS 5.3) — A vulnerability was found in Nothings stb up to f056911. It has been classified as problematic. Affected is th…
    CVE-2023-43281 (CVSS 6.5) — Double Free vulnerability in Nothings Stb Image.h v.2.28 allows a remote attacker to cause a denial of service…
    CVE-2023-45667 (CVSS 5.3) — stb_image is a single file MIT licensed library for processing images. If `stbi__load_gif_main` in `stbi_load…
    CVE-2023-45666 (CVSS 7.3) — stb_image is a single file MIT licensed library for processing images. It may look like `stbi__load_gif_main`…
    CVE-2023-45664 (CVSS 7.3) — stb_image is a single file MIT licensed library for processing images. A crafted image file can trigger `stbi_…
    CVE-2023-45663 (CVSS 5.3) — stb_image is a single file MIT licensed library for processing images. The stbi__getn function reads a specifi…
    CVE-2023-45662 (CVSS 6.5) — stb_image is a single file MIT licensed library for processing images. When `stbi_set_flip_vertically_on_load`…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High