PYSEC-2026-687

Vulnerability from pysec - Published: 2026-07-02 14:13 - Updated: 2026-07-06 07:36
VLAI
Details

Denial of service (DoS) vulnerability in Nicotine+ starting with version 3.0.3 and prior to version 3.2.1 allows a user with a modified Soulseek client to crash Nicotine+ by sending a file download request with a file path containing a null character.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impacted products
Name purl
nicotine-plus pkg:pypi/nicotine-plus
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "nicotine-plus",
        "purl": "pkg:pypi/nicotine-plus"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.3"
            },
            {
              "fixed": "3.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0.3",
        "3.0.4",
        "3.0.5",
        "3.0.6",
        "3.1.0",
        "3.1.1",
        "3.2.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2021-45848",
    "GHSA-p4v2-r99v-wjc2"
  ],
  "details": "Denial of service (DoS) vulnerability in Nicotine+ starting with version 3.0.3 and prior to version 3.2.1 allows a user with a modified Soulseek client to crash Nicotine+ by sending a file download request with a file path containing a null character.",
  "id": "PYSEC-2026-687",
  "modified": "2026-07-06T07:36:57.348978Z",
  "published": "2026-07-02T14:13:16.407927Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-45848"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nicotine-plus/nicotine-plus/issues/1777"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nicotine-plus/nicotine-plus/commit/0e3e2fac27a518f0a84330f1ddf1193424522045"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nicotine-plus/nicotine-plus"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HWYV53KERFH2EC4XI2IVVQFTV75E5XM6"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202210-20"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/nicotine-plus"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-p4v2-r99v-wjc2"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Nicotine+ DoS on Null Character in Download Request"
}



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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

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.