CVE-2026-9521

A security vulnerability has been detected in fraillt bitsery up to 5.2.4. Affected is the function loadFromSharedState in the library include/bitsery/ext/std_smart_ptr.h. Such manipulation leads to improper validation of specified type of input. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 5.2.5 is able to address this issue. The name of the patch is 66d16516e24893bebc1c8af52bf2fe9ad0735061. Upgrading the affected component is advised.

CVSS v3 7.3 HIGH
CVSS v2.0 7.5 HIGH

7.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://gist.github.com/TrebledJ/750abc64a826f19dd2d6774724629b71
https://github.com/fraillt/bitsery/
https://github.com/fraillt/bitsery/blob/master/CHANGELOG.md#525-2025-10-09
https://github.com/fraillt/bitsery/commit/66d16516e24893bebc1c8af52bf2fe9ad0735061
https://github.com/fraillt/bitsery/releases/tag/v5.2.5
https://vuldb.com/submit/814457
https://vuldb.com/vuln/365541
https://vuldb.com/vuln/365541/cti

Configurations

No configuration.

History

26 May 2026, 02:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-26 02:16

Updated : 2026-05-26 19:54

NVD link : CVE-2026-9521

Mitre link : CVE-2026-9521

CVE.ORG link : CVE-2026-9521

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

CWE-1287

Improper Validation of Specified Type of Input

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