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CVE-2026-9521

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

Published: May 26, 2026Updated: May 26, 2026 Sources: CVE List
NVD MITRE
7.3CVSS
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 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.

EPSS Score
0.1%
Top 79.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low

Weaknesses

CWE-1287Improper Validation of Specified Type of InputCWE-20Improper Input Validation

Affected Products

bitsery
fraillt

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://vuldb.com/vuln/365541
vuldb.com
https://vuldb.com/vuln/365541/cti
vuldb.com
https://vuldb.com/submit/814457
vuldb.com
and 5 more references View all →

Timeline

Published
May 26, 2026
Last Updated
May 26, 2026

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