Cyber Resilience

CVE-2026-12862

Published
22 June 2026
Modified
23 June 2026
CVSS Score v4 5.1
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0038 31th percentile
Risk Priority 35 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-12862 is a medium-severity Improper Neutralization of Input Leaders (CWE-148) vulnerability. Its CVSS base score is 5.1 (Medium).

Operationally, ranked at the 31th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

Untrusted user data was passed verbatim to Excel exports for administrators. This allowed formula injection which can be used to compromise the environment of the user loading the file or other data in the file.

CWE(s)
CWE-148

Related Threats

CVEs Like This One

CVE-2023-4853Shared CWE-148
CVE-2024-53856Shared CWE-148

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match

Input validation directly enforces correct handling of leading sequences so malformed or multiple leaders are rejected before processing.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input validation and sanitization that prevent leader-neutralization flaws.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect missing or malformed leaders, providing partial mitigation.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle includes input-handling requirements that can prevent malformed leader sequences.

A.8.26 Application security requirements partial match
prevents

Application security requirements can mandate proper validation of leading characters or sequences.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure system architecture principles address robust input parsing and neutralization of malformed leaders.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly require proper neutralization of input leaders, covering most of this weakness.

References