CVE-2026-44054: Netatalk predictable afpd session token

CVE-2026-44054 · Severity: medium · CVSS 6.5 · Published 2026-05-21

Netatalk is an open-source implementation of the Apple Filing Protocol (AFP) used to share files between Unix-like systems and Apple computers. A security flaw allows an authenticated user to predict session tokens, which can be used to disrupt the service. This could lead to a denial-of-service (DoS) condition where the file-sharing service becomes unavailable to users.

Technologies: Netatalk. Vendors: Netatalk.

Quick answers

Is CVE-2026-44054 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-44054 being exploited in the wild.
How severe is CVE-2026-44054?
Medium severity, with a CVSS score of 6.5, published 21 May 2026.
Which products and versions are affected?
Netatalk 2.0.0 through 4.4.2.
Is there a fix for CVE-2026-44054?
A patch was published on 2026-05-21: Fixed in version 4.4.3 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-44054 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-44054?
Check whether you run Netatalk at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

Netatalk versions 2.0.0 through 4.4.2 suffer from a predictable session token vulnerability (CWE-330). The afpd session reconnect tokens are derived from the process ID (PID) rather than being cryptographically random. An authenticated attacker can enumerate these tokens and abuse the session reconnection path to terminate processes on the host. This results in a denial-of-service (DoS) condition. The issue is fixed in Netatalk version 4.4.3 or by applying a specific security patch.

Affected products

  • Netatalk Netatalk 2.0.0 through 4.4.2

Timeline

  • 2026-05-13: disclosed: Initial disclosure date reported by vendor
  • 2026-05-21: advisory: NVD publication date
  • 2026-05-21: patched: Fixed in version 4.4.3

References

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