CERTFR-2026-AVI-0973

Vulnerability from certfr_avis - Published: 2026-08-06 - Updated: 2026-08-06

De multiples vulnérabilités ont été découvertes dans les produits Nextcloud. Elles permettent à un attaquant de provoquer une atteinte à la confidentialité des données et un contournement de la politique de sécurité.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products
Vendor Product Description
Nextcloud Mail Mail versions 4.x et 5.x antérieures à 5.5.16
Nextcloud Mail Mail versions 5.7.x antérieures à 5.7.13
Nextcloud Mail Mail versions 3.5.x à 3.7.x antérieures à 3.7.25
Nextcloud Server Server versions 32.0.10 à 32.0.x antérieures à 32.0.12 pour nextcloud et nextcloud enterprise
Nextcloud Server Server versions 33.0.4 à 33.0.x antérieures à 33.0.6 pour nextcloud et nextcloud enterprise
Nextcloud Server Server versions 34.0.x antérieures à 34.0.1 pour nextcloud
Nextcloud Mail Mail versions 5.6.x antérieures à 5.6.20
References

Show details on source website
To clipboard 

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "Mail versions 4.x et 5.x ant\u00e9rieures \u00e0 5.5.16",
      "product": {
        "name": "Mail",
        "vendor": {
          "name": "Nextcloud",
          "scada": false
        }
      }
    },
    {
      "description": "Mail versions 5.7.x ant\u00e9rieures \u00e0 5.7.13",
      "product": {
        "name": "Mail",
        "vendor": {
          "name": "Nextcloud",
          "scada": false
        }
      }
    },
    {
      "description": "Mail versions 3.5.x \u00e0 3.7.x ant\u00e9rieures \u00e0 3.7.25",
      "product": {
        "name": "Mail",
        "vendor": {
          "name": "Nextcloud",
          "scada": false
        }
      }
    },
    {
      "description": "Server versions 32.0.10 \u00e0 32.0.x ant\u00e9rieures \u00e0 32.0.12 pour nextcloud et nextcloud enterprise",
      "product": {
        "name": "Server",
        "vendor": {
          "name": "Nextcloud",
          "scada": false
        }
      }
    },
    {
      "description": "Server versions 33.0.4 \u00e0 33.0.x ant\u00e9rieures \u00e0 33.0.6 pour nextcloud et nextcloud enterprise",
      "product": {
        "name": "Server",
        "vendor": {
          "name": "Nextcloud",
          "scada": false
        }
      }
    },
    {
      "description": "Server versions 34.0.x ant\u00e9rieures \u00e0 34.0.1 pour nextcloud",
      "product": {
        "name": "Server",
        "vendor": {
          "name": "Nextcloud",
          "scada": false
        }
      }
    },
    {
      "description": "Mail versions 5.6.x ant\u00e9rieures \u00e0 5.6.20",
      "product": {
        "name": "Mail",
        "vendor": {
          "name": "Nextcloud",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [
    {
      "name": "CVE-2026-61545",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-61545"
    },
    {
      "name": "CVE-2026-61527",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-61527"
    }
  ],
  "initial_release_date": "2026-08-06T00:00:00",
  "last_revision_date": "2026-08-06T00:00:00",
  "links": [],
  "reference": "CERTFR-2026-AVI-0973",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2026-08-06T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "Contournement de la politique de s\u00e9curit\u00e9"
    },
    {
      "description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans les produits Nextcloud. Elles permettent \u00e0 un attaquant de provoquer une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es et un contournement de la politique de s\u00e9curit\u00e9.",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans les produits Nextcloud",
  "vendor_advisories": [
    {
      "published_at": "2026-08-05",
      "title": "Bulletin de s\u00e9curit\u00e9 Nextcloud GHSA-99gw-ww6p-f2rr",
      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-99gw-ww6p-f2rr"
    },
    {
      "published_at": "2026-08-05",
      "title": "Bulletin de s\u00e9curit\u00e9 Nextcloud GHSA-vq3v-jv6f-6xp2",
      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-vq3v-jv6f-6xp2"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.