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CVE-2018-5153

Mozilla: Out-of-bounds read in mixed content websocket messages

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Severity

Moderate

Red Hat Product Security

7.5

CVSS 3.0

Review impact separately from score.

Published · May 9, 2018

Updated · November 22, 2025

Description

If websocket data is sent with mixed text and binary in a single message, the binary data can be corrupted. This can result in an out-of-bounds read with the read memory sent to the originating server in response. This vulnerability affects Firefox < 60.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE-122 · Heap-based Buffer Overflow