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    2 vulnerabilities found for libpng-apng by pnggroup

    CVE-2026-40930 (GCVE-0-2026-40930)

    Vulnerability from nvd – Published: 2026-06-04 14:34 – Updated: 2026-06-04 16:37
    VLAI
    Title
    LIBPNG: Chunk smuggling in push-mode APNG parser via unconsumed chunk body
    Summary
    LIBPNG is a reference library for use in applications that process PNG (Portable Network Graphics) raster image files. In version 1.8.0, three inter-frame chunk discard paths in the push-mode APNG parser clear the chunk-header flag without consuming the chunk body and CRC, allowing attacker-controlled bytes inside an ignored ancillary chunk to be reinterpreted as a fresh chunk header on the next call to `png_process_data`. Commit faf06924688b62d7c1654b5ceddedbde66ffadb4 fixes the issue.
    Severity
    5.4 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-436 - Interpretation Conflict
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
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        {
          "product": "libpng",
          "vendor": "pnggroup",
          "versions": [
            {
              "status": "affected",
              "version": "= 1.8.0"
            }
          ]
        },
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              "status": "affected",
              "version": "\u003e= 1.6.49, \u003c= 1.6.57"
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      "title": "LIBPNG: Chunk smuggling in push-mode APNG parser via unconsumed chunk body"
    }
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    CVE-2026-40930 (GCVE-0-2026-40930)

    Vulnerability from cvelistv5 – Published: 2026-06-04 14:34 – Updated: 2026-06-04 16:37
    VLAI
    Title
    LIBPNG: Chunk smuggling in push-mode APNG parser via unconsumed chunk body
    Summary
    LIBPNG is a reference library for use in applications that process PNG (Portable Network Graphics) raster image files. In version 1.8.0, three inter-frame chunk discard paths in the push-mode APNG parser clear the chunk-header flag without consuming the chunk body and CRC, allowing attacker-controlled bytes inside an ignored ancillary chunk to be reinterpreted as a fresh chunk header on the next call to `png_process_data`. Commit faf06924688b62d7c1654b5ceddedbde66ffadb4 fixes the issue.
    Severity
    5.4 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-436 - Interpretation Conflict
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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