PYSEC-2026-522

Vulnerability from pysec - Published: 2026-06-29 11:50 - Updated: 2026-06-29 12:05
VLAI
Details

paraparser in ReportLab before 3.5.31 allows remote code execution because start_unichar in paraparser.py evaluates untrusted user input in a unichar element in a crafted XML document with '<unichar code="' followed by arbitrary Python code, a similar issue to CVE-2019-17626.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Impacted products
Name purl
reportlab
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "reportlab"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.5.31"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0",
        "2.3",
        "2.4",
        "2.5",
        "2.6",
        "2.7",
        "3.0",
        "3.1.44",
        "3.1.8",
        "3.2.0",
        "3.3.0",
        "3.4.0",
        "3.5.0",
        "3.5.1",
        "3.5.10",
        "3.5.11",
        "3.5.12",
        "3.5.13",
        "3.5.16",
        "3.5.17",
        "3.5.18",
        "3.5.19",
        "3.5.2",
        "3.5.20",
        "3.5.21",
        "3.5.23",
        "3.5.26",
        "3.5.28",
        "3.5.4",
        "3.5.5",
        "3.5.6",
        "3.5.8",
        "3.5.9"
      ]
    }
  ],
  "aliases": [
    "CVE-2019-19450",
    "GHSA-pj98-2xf6-cff5"
  ],
  "details": "paraparser in ReportLab before 3.5.31 allows remote code execution because start_unichar in paraparser.py evaluates untrusted user input in a unichar element in a crafted XML document with \u0027\u003cunichar code=\"\u0027 followed by arbitrary Python code, a similar issue to CVE-2019-17626.",
  "id": "PYSEC-2026-522",
  "modified": "2026-06-29T12:05:47.189019Z",
  "published": "2026-06-29T11:50:43.995090Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-19450"
    },
    {
      "type": "WEB",
      "url": "https://github.com/MrBitBucket/reportlab-mirror/blob/master/CHANGES.md"
    },
    {
      "type": "WEB",
      "url": "https://github.com/MrBitBucket/reportlab-mirror/blob/master/CHANGES.md#release-353115102019"
    },
    {
      "type": "PACKAGE",
      "url": "https://hg.reportlab.com/hg-public/reportlab"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00037.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHMCB2GJQKFMGVO5RWHN222NQL5XYPHZ"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HADPTB3SBU7IVRMDK7OL6WSQRU5AFWDZ"
    },
    {
      "type": "WEB",
      "url": "https://pastebin.com/5MicRrr4"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/reportlab"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-pj98-2xf6-cff5"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ReportLab vulnerable to remote code execution via paraparser"
}


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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.
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  • 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.


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