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CVE-2026-72709 is a missing-authorization vulnerability in SPIP versions before 4.4.18. Administrative action handlers validate an HMAC-SHA256 nonce but fail to perform a server-side authorization check through autoriser(). An unauthenticated attacker can obtain or calculate a valid nonce in the anonymous-user context for an arbitrary action and invoke the author-editing administrative action to reset the password of any account, including an administrator account.
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No public exploit code observed for this vulnerability.
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A critical, network-reachable vulnerability identified as CVE-2026-72709 affecting listed Canonical Ubuntu Linux LTS releases. The provided CVSS vector indicates unauthenticated remote exploitation with high confidentiality, integrity, and availability impact, but the content does not describe the underlying flaw or affected component.
An unauthenticated missing-authorization flaw in SPIP administrative action endpoints. A valid HMAC-SHA256 nonce can be computed as an anonymous user and used to invoke privileged actions, including resetting any account's password through editer_auteur, potentially compromising administrator accounts.
A critical missing-authorization vulnerability in SPIP versions before 4.4.18. An unauthenticated attacker can generate or obtain a valid HMAC-SHA256 nonce and invoke the editer_auteur administrative action without a server-side permission check, enabling password resets for arbitrary accounts, including administrators.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.