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CVE-2021-28677

Status: ModifiedHigh (7.5)—

An issue was discovered in Pillow before 8.2.0. For EPS data, the readline implementation used in EPSImageFile has to deal with any combination of \r and \n as line endings. It used an accidentally quadratic method of accumulating lines while looking for a line ending. A malicious EPS file could use this to perform a DoS of Pillow in the open phase, before an image was accepted for opening.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Fedoraproject — FedoraPython — Pillow

CWEs

References

Raw JSON (NVD)

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  "id": "CVE-2021-28677",
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          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
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      "value": "An issue was discovered in Pillow before 8.2.0. For EPS data, the readline implementation used in EPSImageFile has to deal with any combination of \\r and \\n as line endings. It used an accidentally quadratic method of accumulating lines while looking for a line ending. A malicious EPS file could use this to perform a DoS of Pillow in the open phase, before an image was accepted for opening."
    },
    {
      "lang": "es",
      "value": "Se ha detectado un problema en Pillow versiones anteriores a 8.2.0,. Para los datos EPS, la implementación readline usada en la función EPSImageFile tiene que tratar con cualquier combinación de \\r y \\n como finales de línea. Usaba un método accidentalmente cuadrático de acumulación de líneas mientras buscaba un final de línea. Un archivo EPS malicioso podría usar esto para llevar a cabo un DoS de Pillow en la fase de apertura, antes de que una imagen fuera aceptada para su apertura"
    }
  ],
  "lastModified": "2026-06-17T03:46:46.720",
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}