vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-95509

Out-of-bounds read vulnerability in string formatting impacts Qt for MCUs

HIGH
8.8
CVSS Score
Published: September 29, 2026 at 10:40 AM UTC
Updated: September 30, 2026 at 04:30 PM UTC
1 product affected across 1 vendorQt for MCUs

Using Qt for MCUs by qt?

Get instant alerts when new vulnerabilities affect Qt for MCUs - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
HIGH8.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Strings optimized for Latin-1 displaying Latin-1 characters cause incorrect String.arg() formatting by an incorrect buffer size calculation, causing out-of-bounds reading.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Qt for MCUs· Qt
60%
2.12.0 ≤ v < 2.12.32.6.0 ≤ v < 2.11.32.12.02.6.0
Affected range stops below 2.11.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.12.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Issue Tracking
Source: cverecord
https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-95509:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHQt
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-125CWE-131

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card