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Vulnerabilities

Vulnerability · CVE-2026-58616

Concurrent execution using shared resource with improper synchronization ('race condition') in Copilot Chat (Microsoft Edge) allows an authorized attacker to disclose…

Published Aug 28, 2026 · catalog updated Oct 28, 2026 · edge chromium

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-58616. EPSS is 0.29%. Act only if a listed version of edge chromium is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Low3.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.29%
Remediation
Version ranges on file
Affected products
cpe microsoft/edge chromium

Concurrent execution using shared resource with improper synchronization ('race condition') in Copilot Chat (Microsoft Edge) allows an authorized attacker to disclose information over a network.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe microsoft/edge chromium< 152.0.4191.53

How to fix CVE-2026-58616

  • Upgrade

    CVE-2026-58616 lists a fix boundary at 152.0.4191.53. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 152.0.4191.53

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-58616. EPSS is 0.29%. Act only if a listed version of edge chromium is installed.

Which versions are affected?

Compare what you have installed with microsoft/edge chromium < 152.0.4191.53. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-362: Race Condition. EPSS 0.29%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 28, 2026 · NIST NVD

    Detected

    Concurrent execution using shared resource with improper synchronization ('race condition') in Copilot Chat (Microsoft Edge) allows an authorized attacker to disclose information over a network.

  2. Oct 28, 2026 · NIST NVD

    Updated

    Concurrent execution using shared resource with improper synchronization ('race condition') in Copilot Chat (Microsoft Edge) allows an authorized attacker to disclose information over a network.

Sources

  • CVE.orgVulnerability recordCVE-2026-58616

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-58616

    Concurrent execution using shared resource with improper synchronization ('race condition') in Copilot Chat (Microsoft Edge) allows an authorized attacker to disclose information over a network.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 29, 2026
  • NIST NVDOct 29, 2026