Out-of-bounds write vulnerability in QTextCodec iconv-based encoding impacts Qt

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-107590
StatePUBLISHED
AssignerQt
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-27 13:16:54 UTC
Updated2026-10-27 15:03:41 UTC
DescriptionAn out-of-bounds write vulnerability in the Qt QTextCodec iconv-based encoding of the Qt 5 Compatibility APIs module (Qt Core in Qt 5 and earlier) impacts Qt. Under certain conditions, encoding text with QTextCodec may write outside an internal buffer. This can cause the application to crash and may affect data integrity.

Risk And Classification

Primary CVSS: v4.0 1.9 LOW from a59d8014-47c4-4630-ab43-e1b13cbe58e3

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/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:U/V:X/RE:L/U:Green

Problem Types: CWE-131 | CWE-787 | CWE-787 CWE-787 Out-of-bounds Write | CWE-131 CWE-131 Incorrect Calculation of Buffer Size

VersionSourceTypeScoreSeverityVector
4.0a59d8014-47c4-4630-ab43-e1b13cbe58e3Secondary1.9LOWCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/C...
4.0CNACVSS1.9LOWCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/R...

CVSS v4.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
Passive
Confidentiality
None
Integrity
Low
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/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:U/V:X/RE:L/U:Green

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Qt Qt unaffected 4.5.0 python Not specified
CNA Qt Qt affected 4.5.0 6.8.8 python Not specified
CNA Qt Qt affected 6.9.0 6.11.2 python Not specified

References

ReferenceSourceLinkTags
wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products a59d8014-47c4-4630-ab43-e1b13cbe58e3 wiki.qt.io
codereview.qt-project.org/c/qt/qt5compat/+/762752 a59d8014-47c4-4630-ab43-e1b13cbe58e3 codereview.qt-project.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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