High 7.3Published May 25, 2026

CVE-2026-9521fraillt bitsery std_smart_ptr.h loadFromSharedState improper validation of specified type of input

Updated under an hour ago (Oct 28, 2026, 8:40 AM ET)

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Every CVE for fraillt bitsery

Exploited in the last 30 days

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: 7.3 HIGH (v3.1, CNA)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
Weakness (CWE): CWE-1287, CWE-20
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: May 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

fraillt bitsery fraillt:bitsery	5.2.0; 5.2.1; 5.2.2; 5.2.3; 5.2.4; 5.2.5 not affected	CNA record

References

References

https://vuldb.com/vuln/365541	vdb-entry, technical-description
https://vuldb.com/vuln/365541/cti	signature, permissions-required
https://vuldb.com/submit/814457	third-party-advisory
https://gist.github.com/TrebledJ/750abc64a826f19dd2d6774724629b71	exploit
https://github.com/fraillt/bitsery/blob/master/CHANGELOG.md#525-2025-10-09	release-notes
https://github.com/fraillt/bitsery/commit/66d16516e24893bebc1c8af52bf2fe9ad0735061	patch
https://github.com/fraillt/bitsery/releases/tag/v5.2.5	patch
https://github.com/fraillt/bitsery/	product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.