Vulnerability-Lookup

OESA-2026-2149 (CVE-2026-34757)

Vulnerability from osv_openeuler – Published: 2026-05-03 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

libpng security update

Details

The libpng package contains libraries used by other programs for reading and writing PNG format files. The PNG format was designed as a replacement for GIF and, to a lesser extent, TIFF, with many improvements and extensions and lack of patent problems.

Security Fix(es):

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.0.9 to before 1.6.57, passing a pointer obtained from png_get_PLTE, png_get_tRNS, or png_get_hIST back into the corresponding setter on the same png_struct/png_info pair causes the setter to read from freed memory and copy its contents into the replacement buffer. The setter frees the internal buffer before copying from the caller-supplied pointer, which now dangles. The freed region may contain stale data (producing silently corrupted chunk metadata) or data from subsequent heap allocations (leaking unrelated heap contents into the chunk struct). This vulnerability is fixed in 1.6.57.(CVE-2026-34757)

Severity

5.1 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-34757	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "libpng-1.6.37-8.oe2003sp4.aarch64.rpm",
          "libpng-debuginfo-1.6.37-8.oe2003sp4.aarch64.rpm",
          "libpng-debugsource-1.6.37-8.oe2003sp4.aarch64.rpm",
          "libpng-devel-1.6.37-8.oe2003sp4.aarch64.rpm",
          "libpng-help-1.6.37-8.oe2003sp4.aarch64.rpm"
        ],
        "src": [
          "libpng-1.6.37-8.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "libpng-1.6.37-8.oe2003sp4.x86_64.rpm",
          "libpng-debuginfo-1.6.37-8.oe2003sp4.x86_64.rpm",
          "libpng-debugsource-1.6.37-8.oe2003sp4.x86_64.rpm",
          "libpng-devel-1.6.37-8.oe2003sp4.x86_64.rpm",
          "libpng-help-1.6.37-8.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "libpng",
        "purl": "pkg:rpm/openEuler/libpng\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
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          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.37-8.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "libpng-1.6.38-9.oe2203sp4.aarch64.rpm",
          "libpng-debuginfo-1.6.38-9.oe2203sp4.aarch64.rpm",
          "libpng-debugsource-1.6.38-9.oe2203sp4.aarch64.rpm",
          "libpng-devel-1.6.38-9.oe2203sp4.aarch64.rpm",
          "libpng-help-1.6.38-9.oe2203sp4.aarch64.rpm",
          "libpng-static-1.6.38-9.oe2203sp4.aarch64.rpm",
          "libpng-tools-1.6.38-9.oe2203sp4.aarch64.rpm"
        ],
        "src": [
          "libpng-1.6.38-9.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "libpng-1.6.38-9.oe2203sp4.x86_64.rpm",
          "libpng-debuginfo-1.6.38-9.oe2203sp4.x86_64.rpm",
          "libpng-debugsource-1.6.38-9.oe2203sp4.x86_64.rpm",
          "libpng-devel-1.6.38-9.oe2203sp4.x86_64.rpm",
          "libpng-help-1.6.38-9.oe2203sp4.x86_64.rpm",
          "libpng-static-1.6.38-9.oe2203sp4.x86_64.rpm",
          "libpng-tools-1.6.38-9.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "libpng",
        "purl": "pkg:rpm/openEuler/libpng\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
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            },
            {
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        }
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    },
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          "libpng-debuginfo-1.6.40-9.oe2403.aarch64.rpm",
          "libpng-debugsource-1.6.40-9.oe2403.aarch64.rpm",
          "libpng-devel-1.6.40-9.oe2403.aarch64.rpm",
          "libpng-static-1.6.40-9.oe2403.aarch64.rpm",
          "libpng-tools-1.6.40-9.oe2403.aarch64.rpm",
          "libpng-1.6.40-9.oe2403sp1.aarch64.rpm",
          "libpng-debuginfo-1.6.40-9.oe2403sp1.aarch64.rpm",
          "libpng-debugsource-1.6.40-9.oe2403sp1.aarch64.rpm",
          "libpng-devel-1.6.40-9.oe2403sp1.aarch64.rpm",
          "libpng-static-1.6.40-9.oe2403sp1.aarch64.rpm",
          "libpng-tools-1.6.40-9.oe2403sp1.aarch64.rpm",
          "libpng-1.6.40-9.oe2403sp3.aarch64.rpm",
          "libpng-debuginfo-1.6.40-9.oe2403sp3.aarch64.rpm",
          "libpng-debugsource-1.6.40-9.oe2403sp3.aarch64.rpm",
          "libpng-devel-1.6.40-9.oe2403sp3.aarch64.rpm",
          "libpng-static-1.6.40-9.oe2403sp3.aarch64.rpm",
          "libpng-tools-1.6.40-9.oe2403sp3.aarch64.rpm"
        ],
        "noarch": [
          "libpng-help-1.6.40-9.oe2403.noarch.rpm",
          "libpng-help-1.6.40-9.oe2403sp1.noarch.rpm",
          "libpng-help-1.6.40-9.oe2403sp3.noarch.rpm"
        ],
        "src": [
          "libpng-1.6.40-9.oe2403.src.rpm",
          "libpng-1.6.40-9.oe2403sp1.src.rpm",
          "libpng-1.6.40-9.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "libpng-1.6.40-9.oe2403.x86_64.rpm",
          "libpng-debuginfo-1.6.40-9.oe2403.x86_64.rpm",
          "libpng-debugsource-1.6.40-9.oe2403.x86_64.rpm",
          "libpng-devel-1.6.40-9.oe2403.x86_64.rpm",
          "libpng-static-1.6.40-9.oe2403.x86_64.rpm",
          "libpng-tools-1.6.40-9.oe2403.x86_64.rpm",
          "libpng-1.6.40-9.oe2403sp1.x86_64.rpm",
          "libpng-debuginfo-1.6.40-9.oe2403sp1.x86_64.rpm",
          "libpng-debugsource-1.6.40-9.oe2403sp1.x86_64.rpm",
          "libpng-devel-1.6.40-9.oe2403sp1.x86_64.rpm",
          "libpng-static-1.6.40-9.oe2403sp1.x86_64.rpm",
          "libpng-tools-1.6.40-9.oe2403sp1.x86_64.rpm",
          "libpng-1.6.40-9.oe2403sp3.x86_64.rpm",
          "libpng-debuginfo-1.6.40-9.oe2403sp3.x86_64.rpm",
          "libpng-debugsource-1.6.40-9.oe2403sp3.x86_64.rpm",
          "libpng-devel-1.6.40-9.oe2403sp3.x86_64.rpm",
          "libpng-static-1.6.40-9.oe2403sp3.x86_64.rpm",
          "libpng-tools-1.6.40-9.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS",
        "name": "libpng",
        "purl": "pkg:rpm/openEuler/libpng\u0026distro=openEuler-24.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.40-9.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "libpng-1.6.40-9.oe2403sp1.aarch64.rpm",
          "libpng-debuginfo-1.6.40-9.oe2403sp1.aarch64.rpm",
          "libpng-debugsource-1.6.40-9.oe2403sp1.aarch64.rpm",
          "libpng-devel-1.6.40-9.oe2403sp1.aarch64.rpm",
          "libpng-static-1.6.40-9.oe2403sp1.aarch64.rpm",
          "libpng-tools-1.6.40-9.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "libpng-help-1.6.40-9.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "libpng-1.6.40-9.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "libpng-1.6.40-9.oe2403sp1.x86_64.rpm",
          "libpng-debuginfo-1.6.40-9.oe2403sp1.x86_64.rpm",
          "libpng-debugsource-1.6.40-9.oe2403sp1.x86_64.rpm",
          "libpng-devel-1.6.40-9.oe2403sp1.x86_64.rpm",
          "libpng-static-1.6.40-9.oe2403sp1.x86_64.rpm",
          "libpng-tools-1.6.40-9.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "libpng",
        "purl": "pkg:rpm/openEuler/libpng\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.40-9.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "libpng-1.6.40-9.oe2403sp3.aarch64.rpm",
          "libpng-debuginfo-1.6.40-9.oe2403sp3.aarch64.rpm",
          "libpng-debugsource-1.6.40-9.oe2403sp3.aarch64.rpm",
          "libpng-devel-1.6.40-9.oe2403sp3.aarch64.rpm",
          "libpng-static-1.6.40-9.oe2403sp3.aarch64.rpm",
          "libpng-tools-1.6.40-9.oe2403sp3.aarch64.rpm"
        ],
        "noarch": [
          "libpng-help-1.6.40-9.oe2403sp3.noarch.rpm"
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        ],
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          "libpng-debuginfo-1.6.40-9.oe2403sp3.x86_64.rpm",
          "libpng-debugsource-1.6.40-9.oe2403sp3.x86_64.rpm",
          "libpng-devel-1.6.40-9.oe2403sp3.x86_64.rpm",
          "libpng-static-1.6.40-9.oe2403sp3.x86_64.rpm",
          "libpng-tools-1.6.40-9.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "libpng",
        "purl": "pkg:rpm/openEuler/libpng\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.40-9.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "The libpng package contains libraries used by other programs for reading and writing PNG format files. The PNG format was designed as a replacement for GIF and, to a lesser extent, TIFF, with many improvements and extensions and lack of patent problems.\r\n\r\nSecurity Fix(es):\n\nLIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.0.9 to before 1.6.57, passing a pointer obtained from png_get_PLTE, png_get_tRNS, or png_get_hIST back into the corresponding setter on the same png_struct/png_info pair causes the setter to read from freed memory and copy its contents into the replacement buffer. The setter frees the internal buffer before copying from the caller-supplied pointer, which now dangles. The freed region may contain stale data (producing silently corrupted chunk metadata) or data from subsequent heap allocations (leaking unrelated heap contents into the chunk struct). This vulnerability is fixed in 1.6.57.(CVE-2026-34757)",
  "id": "OESA-2026-2149",
  "modified": "2026-08-06T11:11:08Z",
  "published": "2026-05-03T11:11:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2149"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34757"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libpng security update",
  "upstream": [
    "CVE-2026-34757"
  ]
}

CVE-2026-34757 (GCVE-0-2026-34757)

Vulnerability from cvelistv5 – Published: 2026-04-09 14:41 – Updated: 2026-05-09 10:21

Title

LIBPNG has a yse-after-free in png_set_PLTE, png_set_tRNS and png_set_hIST leading to corrupted chunk data and potential heap information disclosure

Summary

Severity

5.1 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-09 16:07 UTC

CWE

CWE-416 - Use After Free

Assigner

GitHub_M mitre root Scorecard

References

6 references

URL	Tags
https://github.com/pnggroup/libpng/security/advis…	x_refsource_CONFIRM
https://github.com/pnggroup/libpng/issues/836	x_refsource_MISC
https://github.com/pnggroup/libpng/issues/837	x_refsource_MISC
https://github.com/pnggroup/libpng/commit/398cbe3…	x_refsource_MISC
https://github.com/pnggroup/libpng/commit/55d20aa…	x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2026…

Impacted products

1 product

Vendor	Product	Version
pnggroup	libpng	Affected: >= 1.0.9, < 1.6.57

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-34757",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-09T16:07:19.169786Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-09T16:07:31.052Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-05-09T10:21:48.394Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2026/05/msg00017.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "libpng",
          "vendor": "pnggroup",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.0.9, \u003c 1.6.57"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.0.9 to before 1.6.57, passing a pointer obtained from png_get_PLTE, png_get_tRNS, or png_get_hIST back into the corresponding setter on the same png_struct/png_info pair causes the setter to read from freed memory and copy its contents into the replacement buffer. The setter frees the internal buffer before copying from the caller-supplied pointer, which now dangles. The freed region may contain stale data (producing silently corrupted chunk metadata) or data from subsequent heap allocations (leaking unrelated heap contents into the chunk struct). This vulnerability is fixed in 1.6.57."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416: Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-09T14:41:18.195Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/pnggroup/libpng/security/advisories/GHSA-6fr7-g8h7-v645",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/pnggroup/libpng/security/advisories/GHSA-6fr7-g8h7-v645"
        },
        {
          "name": "https://github.com/pnggroup/libpng/issues/836",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pnggroup/libpng/issues/836"
        },
        {
          "name": "https://github.com/pnggroup/libpng/issues/837",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pnggroup/libpng/issues/837"
        },
        {
          "name": "https://github.com/pnggroup/libpng/commit/398cbe3df03f4e11bb031e07f416dfdde3684e8a",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pnggroup/libpng/commit/398cbe3df03f4e11bb031e07f416dfdde3684e8a"
        },
        {
          "name": "https://github.com/pnggroup/libpng/commit/55d20aaa322c9274491cda82c5cd4f99b48c6bcc",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pnggroup/libpng/commit/55d20aaa322c9274491cda82c5cd4f99b48c6bcc"
        }
      ],
      "source": {
        "advisory": "GHSA-6fr7-g8h7-v645",
        "discovery": "UNKNOWN"
      },
      "title": "LIBPNG has a yse-after-free in png_set_PLTE, png_set_tRNS and png_set_hIST leading to corrupted chunk data and potential heap information disclosure"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-34757",
    "datePublished": "2026-04-09T14:41:18.195Z",
    "dateReserved": "2026-03-30T19:17:10.225Z",
    "dateUpdated": "2026-05-09T10:21:48.394Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

OESA-2026-2149 (CVE-2026-34757)

CVE-2026-34757 (GCVE-0-2026-34757)

Tags

Sightings

Nomenclature

Related by attack behaviour