CVE-2026-107590
Out-of-bounds write vulnerability in QTextCodec iconv-based encoding impacts Qt
An 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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Passive
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Out-of-bounds write vulnerability in QTextCodec iconv-based encoding impacts Qt
An 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.
- Record
CVE-2026-107590- CVSS 4.0
- 1.9 Low
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/R:U/RE:L/U:Green - Weakness
- CWE-787, CWE-131
- Updated
- 2026-11-04
EUVDEUVD-2026-110826
An 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.
- Record
EUVD-2026-110826- CVSS 4.0
- 1.9 Low
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/R:U/RE:L/U:Green - Updated
- 2026-11-04
GitHub AdvisoriesGHSA-6m7p-vvj6-5527
An out-of-bounds write vulnerability in the Qt QTextCodec iconv-based encoding of the Qt 5...
An 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.
- Record
GHSA-6m7p-vvj6-5527- CVSS 4.0
- 1.9 Low
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 - Weakness
- CWE-131
- Updated
- 2026-11-02
NVD
An 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.
- Record
CVE-2026-107590- CVSS 4.0
- 1.9 Low
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 - Weakness
- CWE-131, CWE-787
- Updated
- 2026-11-04
OSVDEBIAN-CVE-2026-107590
An 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.
- Record
DEBIAN-CVE-2026-107590- CVSS 4.0
- 1.9 Low
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 - Updated
- 2026-11-07
OSVUBUNTU-CVE-2026-107590
An 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.
- Record
UBUNTU-CVE-2026-107590- CVSS 4.0
- 1.9 Low
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/R:U/RE:L/U:Green - Updated
- 2026-11-05
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
qt6-5compatDebian:12 |
All versions, plus listed versions 6.10.2-16.10.2-26.10.2-36.10.2-46.11.2-1 Show 21 moreShow less6.11.2-26.11.2-36.4.2-16.4.2-26.4.2-36.4.2-46.6.1-16.6.1-26.6.2-16.6.2-26.7.2-16.7.2-26.7.2-36.8.2-16.8.2-26.8.2-36.9.1-16.9.1-26.9.2-16.9.2-26.9.2-3 |
None known |
qt6-5compatDebian:13 |
All versions, plus listed versions 6.10.2-16.10.2-26.10.2-36.10.2-46.11.2-1 Show 8 moreShow less6.11.2-26.11.2-36.8.2-36.9.1-16.9.1-26.9.2-16.9.2-26.9.2-3 |
None known |
qt6-5compatDebian:14 |
All versions, plus listed versions 6.10.2-16.10.2-26.10.2-36.10.2-46.11.2-1 Show 8 moreShow less6.11.2-26.11.2-36.8.2-36.9.1-16.9.1-26.9.2-16.9.2-26.9.2-3 |
None known |
qtbase-opensource-srcDebian:12 |
All versions, plus listed versions 5.15.10+dfsg-15.15.10+dfsg-25.15.10+dfsg-35.15.10+dfsg-45.15.10+dfsg-5 Show 45 moreShow less5.15.10+dfsg-65.15.10+dfsg-75.15.10+dfsg-7.15.15.10+dfsg-7.25.15.11+dfsg-15.15.12+dfsg-15.15.12+dfsg-25.15.12+dfsg-35.15.13+dfsg-15.15.13+dfsg-25.15.13+dfsg-35.15.13+dfsg-45.15.14+dfsg-15.15.15+dfsg-15.15.15+dfsg-25.15.15+dfsg-35.15.15+dfsg-45.15.15+dfsg-55.15.15+dfsg-65.15.16+dfsg-15.15.16+dfsg-25.15.17+dfsg-15.15.17+dfsg-25.15.17+dfsg-35.15.17+dfsg-45.15.17+dfsg-55.15.17+dfsg-65.15.17+dfsg-75.15.17+dfsg-85.15.18+dfsg-15.15.18+dfsg-25.15.19+dfsg-15.15.19+dfsg-25.15.19+dfsg-35.15.19+dfsg-45.15.19+dfsg-55.15.19+dfsg-65.15.8+dfsg-115.15.8+dfsg-11+deb12u15.15.8+dfsg-11+deb12u25.15.8+dfsg-11+deb12u35.15.8+dfsg-125.15.8+dfsg-135.15.9+dfsg-15.15.9+dfsg-2 |
None known |
qtbase-opensource-srcDebian:13 |
All versions, plus listed versions 5.15.15+dfsg-65.15.15+dfsg-6+deb13u15.15.16+dfsg-15.15.16+dfsg-25.15.17+dfsg-1 Show 15 moreShow less5.15.17+dfsg-25.15.17+dfsg-35.15.17+dfsg-45.15.17+dfsg-55.15.17+dfsg-65.15.17+dfsg-75.15.17+dfsg-85.15.18+dfsg-15.15.18+dfsg-25.15.19+dfsg-15.15.19+dfsg-25.15.19+dfsg-35.15.19+dfsg-45.15.19+dfsg-55.15.19+dfsg-6 |
None known |
qtbase-opensource-srcDebian:14 |
All versions, plus listed versions 5.15.15+dfsg-65.15.16+dfsg-15.15.16+dfsg-25.15.17+dfsg-15.15.17+dfsg-2 Show 14 moreShow less5.15.17+dfsg-35.15.17+dfsg-45.15.17+dfsg-55.15.17+dfsg-65.15.17+dfsg-75.15.17+dfsg-85.15.18+dfsg-15.15.18+dfsg-25.15.19+dfsg-15.15.19+dfsg-25.15.19+dfsg-35.15.19+dfsg-45.15.19+dfsg-55.15.19+dfsg-6 |
None known |
qt6-5compatUbuntu:22.04:LTS |
All versions, plus listed versions 6.2.2-56.2.4-1 |
None known |
qt6-5compatUbuntu:24.04:LTS |
All versions, plus listed versions 6.4.2-36.4.2-46.4.2-4build16.4.2-4build26.4.2-4build3 |
None known |
qt6-5compatUbuntu:26.10 |
All versions, plus listed versions 6.10.2-16.10.2-36.10.2-46.11.2-1 |
None known |
qt6-5compatUbuntu:26.04:LTS |
All versions, plus listed versions 6.9.2-16.9.2-36.9.2-3build16.10.2-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | CVE List, EUVD, NVD, OSV | |
| affected, aliases, facts, references | OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-107590 is a low vulnerability (CVSS 1.9) in Qt, published October 27, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.12%, the 1st percentile. No source names a fixed version.
References
wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products
codereview.qt-project.org/c/qt/qt5compat/+/762752
nvd.nist.gov/vuln/detail/CVE-2026-107590
github.com/advisories/GHSA-6m7p-vvj6-5527
security-tracker.debian.org/tracker/CVE-2026-107590
ubuntu.com/security/CVE-2026-107590
cve.org/CVERecord?id=CVE-2026-107590
Left out here: 1 version. The JSON record has them.