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PatchSiren cyber security CVE debrief

CVE-2026-13326 qt CVE debrief

A physically proximate attacker may cause a denial of service or limited memory disclosure via a crafted NFC tag due to an out-of-bounds read in Qt NFC's language code length parsing. This vulnerability impacts systems processing NFC tags in close proximity, particularly those using Qt NFC for tag handling. Defenders should assess exposure and prioritize patching for systems where NFC tags are processed in close proximity. The CVE record and NVD entry provide initial details, but further review of affected versions and remediation guidance is necessary.

Vendor
qt
Product
Unknown
CVSS
MEDIUM 6.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-11
Original CVE updated
2026-09-11
Advisory published
2026-09-11
Advisory updated
2026-09-11

Who should care

Defenders responsible for systems processing NFC tags, especially in close proximity, should assess exposure and prioritize patching. This includes operators of systems using Qt NFC for tag handling, vulnerability management teams, and security teams responsible for reviewing and mitigating potential impacts of crafted NFC tags.

Why it matters

Defenders should care about CVE-2026-13326 as it allows a physically proximate attacker to cause a denial of service or limited memory disclosure via a crafted NFC tag, impacting systems processing NFC tags in close proximity.

  • Denial of service via crafted NFC tags
  • Limited memory disclosure via NFC tag processing
  • Verification of patch application for Qt NFC
  • Review of NFC tag handling systems

Technical summary

An out-of-bounds read in Qt NFC's language code length parsing allows a physically proximate attacker to cause a denial of service or limited memory disclosure via a crafted NFC tag. This vulnerability affects systems using Qt NFC for NFC tag processing, especially in close proximity. Defenders should prioritize verifying and applying patches for Qt NFC, reviewing NFC tag handling systems, and monitoring for potential exploitation attempts.

Defensive priority

Defenders should prioritize verifying and applying patches for Qt NFC, especially in systems where NFC tags are processed in close proximity.

Recommended defensive actions

  • Verify and apply patches for Qt NFC
  • Review and update NFC tag processing systems
  • Monitor for crafted NFC tags

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on affected versions, remediation guidance, and verification steps for patch application is needed. Defenders should verify and apply patches for Qt NFC, review NFC tag processing systems, and monitor for crafted NFC tags. The vulnerability allows a physically proximate attacker to cause a denial of service or limited memory disclosure via a crafted NFC tag.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-13326 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-13326

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-13326 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-13326

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://codereview.qt-project.org/c/qt/qtconnectivity/+/743136

    a59d8014-47c4-4630-ab43-e1b13cbe58e3

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.