Executive Summary

This vulnerability exists in USCiLab Cereal up to version 1.3.2, specifically in an unknown function of the Shared Pointer Handler component. It involves a manipulation that can lead to type confusion, which is a situation where the program mistakenly treats a piece of data as a different type than it actually is. This flaw can be exploited remotely, meaning an attacker does not need local access to launch an attack. The exploit has been publicly disclosed and may be actively used.

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Impact Analysis

Exploiting this vulnerability can lead to a compromise of confidentiality, integrity, and availability of the affected system. Since the CVSS v3.1 score is 7.3 with impacts on confidentiality, integrity, and availability, an attacker could potentially access sensitive information, alter data, or disrupt system operations remotely without any privileges or user interaction.

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Compliance Impact

The provided information does not specify any direct impact of CVE-2026-11463 on compliance with common standards and regulations such as GDPR or HIPAA.

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Detection Guidance

CVE-2026-11463 affects applications using the cereal library versions 1.3.2 and below, specifically involving insecure deserialization of std::shared_ptr objects leading to type confusion.

Detection involves identifying if your system or network is running vulnerable versions of the cereal library and if untrusted input is being deserialized using cereal's shared pointer handler.

Since the vulnerability is related to deserialization in application code, direct network detection commands are not provided in the resources.

However, you can check the version of the cereal library used in your projects by searching for the version string or inspecting package manifests.

• Use commands like `grep -r "cereal" /path/to/your/project` to locate cereal usage.
• Check for version information in package files or build scripts, e.g., `cat /path/to/cereal/version.txt` or inspect your dependency manager files.
• Review application logs or runtime behavior for signs of type confusion or crashes related to deserialization.

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Mitigation Strategies

Immediate mitigation steps include verifying and restricting the types of objects deserialized by the cereal library to prevent type confusion.

Specifically, ensure that the expected class type matches the object reference during deserialization by using type hashes or RTTI (Run-Time Type Information) for polymorphic types.

Apply any available patches or updates from the vendor or maintainers once released.

Until a fix is available, implement workarounds such as validating or sanitizing input before deserialization to avoid processing untrusted or malformed data.

Monitor for any unusual application behavior that could indicate exploitation attempts.

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