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Advisory severityHigh7.5WatchGuard

High [CVE-2026-13046] deserialization of untrusted data vulnerability in WatchGuard Fireware OS's SAML single sign-on session handling (samld) allows an attacker who has already obtained the ability to write files on the appliance to execute arbitrary code in the context of the samld service by causing samld to load a maliciously crafted session file

This high-severity WatchGuard advisory covers CVE-2026-13046 affecting Fireware OS.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-13046 Source published Source updated

VulniPulse record published Record updated

CVE-2026-13046
Affected products & platforms
WatchGuardFirebox / Fireware
Open source advisory

Android app · Google Play

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Summary

A deserialization of untrusted data vulnerability in WatchGuard Fireware OS's SAML single sign-on session handling (samld) allows an attacker who has already obtained the ability to write files on the appliance to execute arbitrary code in the context of the samld service by causing samld to load a maliciously crafted session file.

Affected versions
  • Fireware OS 2026.3 before 2026.3.2
  • Fireware OS 2025.0 before 2026.2.3
  • Fireware OS 12.0 before 12.12.3
  • Fireware OS 12.11 before 12.11.10

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

Fixed versions
  • 2026.3.2
  • 2026.2.3
  • 12.12.3
  • 12.11.10

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

Mitigation

Upgrade to a fixed release: 2026.3.2, 2026.2.3, 12.12.3, 12.11.10. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

Discussion(0)

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