CVE-2018-5136

Name: CVE-2018-5136
Creator: NVD / NIST
Published: 2018-06-11T21:29:14.373+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.64%

Last modified Jun 17, 2026

CVE-2018-5136 is a vulnerability of currently unknown severity. A shared worker created from a "data:" URL in one tab can be shared by another tab with a different origin, bypassing the same-origin policy. This vulnerability affects Firefox < 59.. EPSS estimates a 1.64% chance of exploitation in the next 30 days.

Description

A shared worker created from a "data:" URL in one tab can be shared by another tab with a different origin, bypassing the same-origin policy. This vulnerability affects Firefox < 59.

Metrics

EPSS Probability

1.64%

73.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	17.10
Mozilla	Firefox	< 59.0

References

http://www.securityfocus.com/bid/103386Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040514Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1419166Issue Tracking, Permissions Required
https://usn.ubuntu.com/3596-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-06/Vendor Advisory
http://www.securityfocus.com/bid/103386Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040514Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1419166Issue Tracking, Permissions Required
https://usn.ubuntu.com/3596-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-06/Vendor Advisory

Timeline

Published: Jun 11, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-5136?

A shared worker created from a "data:" URL in one tab can be shared by another tab with a different origin, bypassing the same-origin policy. This vulnerability affects Firefox < 59.

How severe is CVE-2018-5136?

Severity scoring for CVE-2018-5136 is pending analysis. The EPSS model estimates a 1.64% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5136?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-5136?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST