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
OSVOESA-2026-4783
qt6-qt5compat security update
.
Security Fix(es):
An out-of-bounds read vulnerability in the QTextCodec TSCII encoding of the Qt 5 Compatibility APIs module (Qt Core in Qt 5 and earlier) impacts Qt. Applications that convert text to the TSCII encoding through QTextCodec may read memory outside the input buffer, which can cause the application to crash or misinterpret the data.(CVE-2026-107472)
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.(CVE-2026-107590)
- Record
OESA-2026-4783- CVSS 4.0
- 4.3 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/R:U/RE:L/U:Green - Updated
- 2026-11-11
Show 4 moreShow less
OSVOESA-2026-4784
qt6-qt5compat security update
.
Security Fix(es):
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.(CVE-2026-107590)
- Record
OESA-2026-4784- 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
- 2026-11-11
OSVOESA-2026-4785
qt6-qt5compat security update
.
Security Fix(es):
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.(CVE-2026-107590)
- Record
OESA-2026-4785- 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
- 2026-11-11
OSVRHSA-2026:89193
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
- Record
RHSA-2026:89193- CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H - Updated
- 2026-11-13
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-qt5compatopenEuler:24.03-LTS-SP4 From an advisory covering 2 CVEs | before 6.5.2-4.oe2403sp4 | 6.5.2-4.oe2403sp4 |
qt6-qt5compatopenEuler:24.03-LTS-SP1 | before 6.5.2-4.oe2403sp1 | 6.5.2-4.oe2403sp1 |
qt6-qt5compatopenEuler:24.03-LTS-SP3 | before 6.5.2-4.oe2403sp3 | 6.5.2-4.oe2403sp3 |
qt6Red Hat:hummingbird:1 From an advisory covering 10 CVEs | before 0:6.12.0-1.hum1 | 0:6.12.0-1.hum1 |
Show 7 moreShow less
| Package | Affected | Fixed |
|---|---|---|
qt6-filesystemRed Hat:hummingbird:1 From an advisory covering 10 CVEs | before 0:6.12.0-1.hum1 | 0:6.12.0-1.hum1 |
qt6-rpm-macrosRed Hat:hummingbird:1 From an advisory covering 10 CVEs | before 0:6.12.0-1.hum1 | 0:6.12.0-1.hum1 |
qt6-srpm-macrosRed Hat:hummingbird:1 From an advisory covering 10 CVEs | before 0:6.12.0-1.hum1 | 0:6.12.0-1.hum1 |
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 | OSV | |
| affected, aliases, facts, references | OSV | |
| 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. Fixed in qt6-qt5compat 6.5.2-4.oe2403sp1.
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
openeuler.org/zh/security/security-bulletins/detail?id=openEuler-SA-2026-4783
Show 60 moreShow less
access.redhat.com/errata/RHSA-2026:89193
images.redhat.com
security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_89193.json
bugzilla.redhat.com/show_bug.cgi?id=2559539
cve.org/CVERecord?id=CVE-2026-95620
ubuntu.com/security/CVE-2026-107590
Left out here: 1 version. The JSON record has them.