CVE-2025-12385Network attack vector

Application hang via unbounded image dimensions

Published Dec 3, 2025 · Updated Jul 29, 2026

Resource exhaustion in Qt Quick Text in affected Qt releases allows remote attackers to hang applications via crafted rich text. The Qt declarative parser accepts unbounded width and height values from img tags and allocates resources according to those values. Exploitation requires an application to pass attacker-controlled rich text to a Qt Quick Text component and can leave that application unresponsive.

CVSS severity8.7
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Qt Quick Text in affected Qt releases allows remote attackers to hang applications via crafted rich text. The Qt declarative parser accepts unbounded width and height values from img tags and allocates resources according to those values. Exploitation requires an application to pass attacker-controlled rich text to a Qt Quick Text component and can leave that application unresponsive.

The record

CVE
CVE-2025-12385
Published
Dec 3, 2025
Updated
Jul 29, 2026
Vendor
The Qt Company
Product
Qt Framework
Classifications
CWE-770, CWE-1284, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.0.0 <=6.5.10
  2. Affected versionversion=6.6.0 <=6.8.5
  3. Affected versionversion=6.9.0 <=6.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Qt Company · Qt Frameworkversion=5.0.0 <=6.5.10; version=6.6.0 <=6.8.5; version=6.9.0 <=6.10.0

Published CVSS scores

8.7The Qt CompanyCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CWE-1284Improper Validation of Specified Quantity in Input
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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