November 15, 2026

CVE Watchtower

CVE-2026-71558Apache Fory Deserialization of Untrusted Data

NVDCVSS scored by 134c704f-9b21-4f2e-91b3-4a467353bcc0

Vulnerability Summary

Heap type confusion vulnerability in Apache Fory C++ deserialization.

This issue affects Apache Fory C++ versions from 0.14.0 before 1.5.0. A crafted input payload can bypass type compatibility checks during polymorphic smart-pointer deserialization, causing an object of an incompatible type to be treated as the declared base type. This may result in undefined behavior and potentially lead to denial of service or arbitrary code execution.


Users are recommended to upgrade to Apache Fory 1.5.0, which fixes this issue. Applications not using Apache Fory C++ polymorphic smart-pointer deserialization are not affected.
Severity Level
CRITICAL(9.8)
Published Date
Aug 7, 2026
Last Modified
Oct 24, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.99%Probability
Root Weakness (CWE)
CWE-502: Deserialization of Untrusted Data β†—
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
CWE-843 β†—
See the MITRE CWE entry for the full definition of this weakness.
CVSS v3.1 Base Metrics — Score 9.8 (CRITICAL)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Apache Fory >= 0.14.0 and < 1.5.0
Patched Versions
  • Apache Fory 1.5.0

What to do

Plan remediation soon. No exploitation is confirmed yet, but the severity is critical.

  1. Check whether you run Apache Fory and which version.
  2. Update to a patched version listed above, then confirm the new version.

Timeline

  • Aug 7, 2026Published
  • Oct 24, 2026Record last modified

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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External References

Data last checked: Nov 15, 2026 06:15 UTC