CVE-2026-102999 (GCVE-0-2026-102999)

Vulnerability from cvelistv5 – Published: 2026-09-30 20:10 – Updated: 2026-09-30 20:10
VLAI
Title
pypdf: Possible long runtimes with large amount of embedded files
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF containing many embedded files can cause the dictionary-based attachments API in pypdf/_doc_common.py to reparse the full attachment list for each content lookup, producing repeated work and long runtimes when an application accesses the embedded-file mapping. This issue is fixed in version 6.19.0.
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
CWE
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
Vendor Product Version CPE status
py-pdf pypdf Affected: < 6.19.0
guessed Create a notification for this product.
Show details on NVD website
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        }
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        {
          "descriptions": [
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              "description": "CWE-407: Inefficient Algorithmic Complexity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-30T20:10:38.433Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
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          "name": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-v247-6f48-mgcj",
          "tags": [
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          "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-v247-6f48-mgcj"
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          "tags": [
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          "url": "https://github.com/py-pdf/pypdf/pull/4081"
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          "tags": [
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          ],
          "url": "https://github.com/py-pdf/pypdf/commit/6b10556d13609a68f9ed18bb29fdd8bba88eb2c3"
        },
        {
          "name": "https://github.com/py-pdf/pypdf/releases/tag/6.19.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/py-pdf/pypdf/releases/tag/6.19.0"
        }
      ],
      "source": {
        "advisory": "GHSA-v247-6f48-mgcj",
        "discovery": "UNKNOWN"
      },
      "title": "pypdf: Possible long runtimes with large amount of embedded files"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-102999",
    "datePublished": "2026-09-30T20:10:38.433Z",
    "dateReserved": "2026-09-29T20:46:08.335Z",
    "dateUpdated": "2026-09-30T20:10:38.433Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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                "vendor": "py-pdf",
                "versions": [
                  {
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                    "version": "\u003c 6.19.0"
                  }
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          }
        ],
        "id": "CVE-2026-102999",
        "lastModified": "2026-09-30T21:17:07.343",
        "metrics": {
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 8.7,
                "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:L/AT:N/PR:N/UI:N/VC:N/VI:N/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",
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                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
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              "type": "Secondary"
            }
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            "source": "security-advisories@github.com",
            "url": "https://github.com/py-pdf/pypdf/pull/4081"
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            "source": "security-advisories@github.com",
            "url": "https://github.com/py-pdf/pypdf/releases/tag/6.19.0"
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            "source": "security-advisories@github.com",
            "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-v247-6f48-mgcj"
          }
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        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Received",
        "weaknesses": [
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                "lang": "en",
                "value": "CWE-400"
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              {
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                "value": "CWE-407"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
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    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-09-30T21:15:34+00:00",
      "cve": "CVE-2026-102999",
      "id": "CVE-2026-102999",
      "initial_release_date": "2026-09-30T20:10:38.433000+00:00",
      "product_status:known_affected": "15",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "pypdf: pypdf: Denial of Service via crafted PDF with numerous embedded files",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102999.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.