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CVE-2025-12385

28
FAUCET Score

CVE-2025-12385 is an "Allocation of Resources Without Limits or Throttling" vulnerability affecting the Text component in Qt Quick across various platforms and versions (5.0.0-6.5.10, 6.6.0-6.8.5, 6.9.0-6.10.0). This flaw allows an attacker to render an application unresponsive by providing an <img> tag with unvalidated width and height values, leading to excessive resource allocation. It carries a CVSSv4 score of 8.7 (HIGH), indicating a high impact on availability with low attack complexity and no user interaction required. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
The Qt CompanyQt
>= 6.9.0, <= 6.10.0, >= 5.0.0, <= 6.5.10, >= 6.6.0, <= 6.8.5CNA affecteddefault unaffected

CVSS Data

CVSS version used by this source: 4.0

8.7HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
NONE
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.28%
Probability of exploitation in next 30 days
EPSS Percentile
20.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0028 is in the 4th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

microsoftpatch availablevia msrc
Product: 20723-17086Fixed in: 5.12.5-6
microsoftpatch availablevia msrc
Product: azl3 qtdeclarative 6.6.1-1 on Azure Linux 3.0Fixed in: 6.6.1-2
microsoftpatch availablevia msrc
Product: cbl2 qt5-qtdeclarative 5.12.5-5 on CBL Mariner 2.0Fixed in: 5.12.5-6
microsoftpatch availablevia msrc
Product: 20722-17084Fixed in: 6.6.1-2
ubuntupatch availablevia ubuntu_usn
Product: qtdeclarative-opensource-src (noble)Fixed in: 5.15.13+dfsg-1ubuntu0.1+esm1
ubuntupatch availablevia ubuntu_usn
Product: qtdeclarative-opensource-src (focal)Fixed in: 5.12.8-0ubuntu1+esm1
ubuntupatch availablevia ubuntu_usn
Product: qtdeclarative-opensource-src (jammy)Fixed in: 5.15.3+dfsg-1ubuntu0.1~esm1

Vendor Advisories (2)

ubuntuUSN-8357-1

Qt Declarative vulnerability

Jun 1, 2026
microsoft2025-Dec/CVE-2025-12385Important

Improper validation of <img> tag size in Text component parser

Dec 9, 2025

References

codereview.qt-project.org / c/qt/qtdeclarative/+/687239
codereview.qt-project.org / c/qt/qtdeclarative/+/687766