CVE-2026-9521

fraillt bitsery std_smart_ptr.h loadFromSharedState improper validation of specified type of input

CVSS 6.3 MEDIUMEPSS 0.4%CWE-1287 CWE-20

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: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

Affected products

fraillt · bitsery

public PoCs found — 1

cve_referencegist.github.com/TrebledJ/750abc64a826f19dd2d6774724629b71unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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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/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