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PatchSiren cyber security CVE debrief

CVE-2026-47644 Microsoft CVE debrief

CVE-2026-47644 is a vulnerability in Copilot Chat (Microsoft Edge) that allows an unauthorized attacker to disclose information over a network. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. It was published on [cvePublishedAt] and modified on [cveModifiedAt]. The vulnerability is caused by improper neutralization of special elements in output used by a downstream component ('injection').

Vendor
Microsoft
Product
Copilot Chat
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-07-23
Advisory published
2026-06-04
Advisory updated
2026-07-23

Who should care

Users of Copilot Chat (Microsoft Edge) should be aware of this vulnerability and take necessary precautions to protect themselves.

Technical summary

The vulnerability is caused by improper neutralization of special elements in output used by a downstream component ('injection') in Copilot Chat (Microsoft Edge). This allows an unauthorized attacker to disclose information over a network.

Defensive priority

MEDIUM

Recommended defensive actions

  • Users should ensure they are running the latest version of Copilot Chat (Microsoft Edge).
  • Users should be cautious when interacting with Copilot Chat (Microsoft Edge) to avoid potential exploitation.

Evidence notes

The vulnerability has been analyzed and has a CVSS vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-47644 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-47644

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

  • CVE-2026-47644 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-47644

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

Supplemental references

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.