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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

Exploitation poc

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Fraillt
  • Bitsery

No data.

No data.

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

Tue, 26 May 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 26 May 2026 02:15:00 +0000

Type Values Removed Values Added
Description 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.
Title fraillt bitsery std_smart_ptr.h loadFromSharedState improper validation of specified type of input
First Time appeared Fraillt
Fraillt bitsery
Weaknesses CWE-1287
CWE-20
CPEs cpe:2.3:a:fraillt:bitsery:*:*:*:*:*:*:*:*
Vendors & Products Fraillt
Fraillt bitsery
References
Metrics cvssV2_0

{'score': 7.5, 'vector': 'AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C'}

cvssV3_0

{'score': 7.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C'}

cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-05-26T02:00:15.197Z

Updated: 2026-05-26T12:21:05.803Z

Reserved: 2026-05-25T19:17:31.511Z

Link: CVE-2026-9521

cve-icon Vulnrichment

Updated: 2026-05-26T12:20:58.814Z

cve-icon NVD

Status : Received

Published: 2026-05-26T02:16:40.983

Modified: 2026-05-26T02:16:40.983

Link: CVE-2026-9521

cve-icon Redhat

No data.