Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- 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/66d16516e24893bebc1c8af52bf2fe9ad07350
- 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
FAQ
What is CVE-2026-9521?
CVE-2026-9521 is a vulnerability with a CVSS score of 7.3 (HIGH). 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 i...
How severe is CVE-2026-9521?
CVE-2026-9521 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-9521?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.