Vulnerability-Lookup

GHSA-5XF7-4P34-54QR

Vulnerability from github – Published: 2026-07-23 16:36 – Updated: 2026-07-23 16:36

Summary

pypdf: Possible infinite loop for not terminated inline images

Details

Impact

An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires parsing the content stream of a page with a not terminated inline image, as done when extracting the page text for example.

Patches

This has been fixed in pypdf==6.14.1.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3891.

Severity

8.7 (High)


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

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "pypdf"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.14.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-59936"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-835"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-23T16:36:41Z",
    "nvd_published_at": "2026-07-08T20:16:59Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nAn attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires parsing the content stream of a page with a not terminated inline image, as done when extracting the page text for example.\n\n### Patches\n\nThis has been fixed in [pypdf==6.14.1](https://github.com/py-pdf/pypdf/releases/tag/6.14.1).\n\n### Workarounds\n\nIf you cannot upgrade yet, consider applying the changes from PR [#3891](https://github.com/py-pdf/pypdf/pull/3891).",
  "id": "GHSA-5xf7-4p34-54qr",
  "modified": "2026-07-23T16:36:41Z",
  "published": "2026-07-23T16:36:41Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-5xf7-4p34-54qr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59936"
    },
    {
      "type": "WEB",
      "url": "https://github.com/py-pdf/pypdf/pull/3891"
    },
    {
      "type": "WEB",
      "url": "https://github.com/py-pdf/pypdf/commit/ec3b14596186c40caca7cf8ab9b2155203e01b5b"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/py-pdf/pypdf"
    },
    {
      "type": "WEB",
      "url": "https://github.com/py-pdf/pypdf/releases/tag/6.14.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "pypdf: Possible infinite loop for not terminated inline images"
}

CVE-2026-59936 (GCVE-0-2026-59936)

Vulnerability from cvelistv5 – Published: 2026-07-08 19:34 – Updated: 2026-07-09 13:28

Title

pypdf: Possible infinite loop for not terminated inline images

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.1, an attacker can craft a PDF with a page content stream containing a not terminated inline image, causing an infinite loop during inline image end marker detection such as when extracting page text. This issue is fixed in version 6.14.1.

Severity

8.7 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M

References

4 references

URL	Tags
https://github.com/py-pdf/pypdf/security/advisori…	x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/pull/3891	x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/ec3b145961…	x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.14.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
py-pdf	pypdf	Affected: < 6.14.1

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-59936",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-09T13:26:41.429218Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-09T13:28:21.161Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "pypdf",
          "vendor": "py-pdf",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.14.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "pypdf is a free and open-source pure-python PDF library. Prior to 6.14.1, an attacker can craft a PDF with a page content stream containing a not terminated inline image, causing an infinite loop during inline image end marker detection such as when extracting page text. This issue is fixed in version 6.14.1."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-08T19:34:22.610Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-5xf7-4p34-54qr",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-5xf7-4p34-54qr"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/pull/3891",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/pull/3891"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/commit/ec3b14596186c40caca7cf8ab9b2155203e01b5b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/commit/ec3b14596186c40caca7cf8ab9b2155203e01b5b"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/releases/tag/6.14.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/releases/tag/6.14.1"
        }
      ],
      "source": {
        "advisory": "GHSA-5xf7-4p34-54qr",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible infinite loop for not terminated inline images"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-59936",
    "datePublished": "2026-07-08T19:34:22.610Z",
    "dateReserved": "2026-07-07T18:20:06.127Z",
    "dateUpdated": "2026-07-09T13:28:21.161Z",
    "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.

Detection rules are retrieved from Rulezet.

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.

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