Vulnerability-Lookup

CVE-2026-25646 (GCVE-0-2026-25646)

Vulnerability from cvelistv5 – Published: 2026-02-10 17:04 – Updated: 2026-02-11 15:31

Title

LIBPNG has a heap buffer overflow in png_set_quantize

Summary

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.55, an out-of-bounds read vulnerability exists in the png_set_quantize() API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported by the user's display, certain palettes will cause the function to enter into an infinite loop that reads past the end of an internal heap-allocated buffer. The images that trigger this vulnerability are valid per the PNG specification. This vulnerability is fixed in 1.6.55.

Severity ?

8.3 (High)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

CWE

CWE-122 - Heap-based Buffer Overflow
CWE-126 - Buffer Over-read

Assigner

GitHub_M

References

URL

Tags

	https://github.com/pnggroup/libpng/security/advis…	x_refsource_CONFIRM
	https://github.com/pnggroup/libpng/commit/01d03b8…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	pnggroup	libpng	Affected: < 1.6.55

Show details on NVD website

JSON

To clipboard

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WID-SEC-W-2026-0353

Vulnerability from csaf_certbund - Published: 2026-02-09 23:00 - Updated: 2026-02-12 23:00

Summary

libpng: Schwachstelle ermöglicht Codeausführung

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung

Die libpng ist die offizielle Referenzbibliothek für die Darstellung und Manipulation von Bildern im Portable Network Graphics (PNG) Format.

Angriff

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in libpng ausnutzen, um möglicherweise beliebigen Code auszuführen, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.

Betroffene Betriebssysteme

- Sonstiges - UNIX - Windows

JSON

To clipboard

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  "document": {
    "aggregate_severity": {
      "text": "mittel"
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        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Die libpng ist die offizielle Referenzbibliothek f\u00fcr die Darstellung und Manipulation von Bildern im Portable Network Graphics (PNG) Format.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in libpng ausnutzen, um m\u00f6glicherweise beliebigen Code auszuf\u00fchren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.",
        "title": "Angriff"
      },
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        "category": "general",
        "text": "- Sonstiges\n- UNIX\n- Windows",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
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      "contact_details": "csaf-provider@cert-bund.de",
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    },
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        "category": "self",
        "summary": "WID-SEC-W-2026-0353 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0353.json"
      },
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        "category": "self",
        "summary": "WID-SEC-2026-0353 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0353"
      },
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        "category": "external",
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        "url": "https://github.com/pnggroup/libpng/releases/tag/v1.6.55"
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        "category": "external",
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        "url": "https://ubuntu.com/security/notices/USN-8039-1"
      },
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        "category": "external",
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          "summary": "Initiale Fassung"
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          "number": "2",
          "summary": "Neue Updates von Ubuntu aufgenommen"
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      "status": "final",
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        "branches": [
          {
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                "name": "\u003c1.6.55",
                "product": {
                  "name": "Open Source libpng \u003c1.6.55",
                  "product_id": "T050675"
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              },
              {
                "category": "product_version",
                "name": "1.6.55",
                "product": {
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                  "product_id": "T050675-fixed",
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              "name": "Ubuntu Linux",
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                "cpe": "cpe:/o:canonical:ubuntu_linux:-"
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        "name": "Ubuntu"
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}

FKIE_CVE-2026-25646

Vulnerability from fkie_nvd - Published: 2026-02-10 18:16 - Updated: 2026-02-13 20:43

Severity ?

8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/pnggroup/libpng/commit/01d03b8453eb30ade759cd45c707e5a1c7277d88	Patch
security-advisories@github.com	https://github.com/pnggroup/libpng/security/advisories/GHSA-g8hp-mq4h-rqm3	Exploit, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/02/09/7	Mailing List
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/pnggroup/libpng/security/advisories/GHSA-g8hp-mq4h-rqm3	Exploit, Vendor Advisory

Impacted products

	Vendor	Product	Version
	libpng	libpng	*

JSON

To clipboard

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    {
      "lang": "en",
      "value": "LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.55, an out-of-bounds read vulnerability exists in the png_set_quantize() API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported by the user\u0027s display, certain palettes will cause the function to enter into an infinite loop that reads past the end of an internal heap-allocated buffer. The images that trigger this vulnerability are valid per the PNG specification. This vulnerability is fixed in 1.6.55."
    }
  ],
  "id": "CVE-2026-25646",
  "lastModified": "2026-02-13T20:43:44.690",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.3,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-10T18:16:37.817",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/pnggroup/libpng/commit/01d03b8453eb30ade759cd45c707e5a1c7277d88"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/pnggroup/libpng/security/advisories/GHSA-g8hp-mq4h-rqm3"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2026/02/09/7"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/pnggroup/libpng/security/advisories/GHSA-g8hp-mq4h-rqm3"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        },
        {
          "lang": "en",
          "value": "CWE-126"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-25646 (GCVE-0-2026-25646)

WID-SEC-W-2026-0353

FKIE_CVE-2026-25646

Tags

Sightings

Nomenclature