Information Exposure Affecting firefox-esr package, versions <119.0-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.63% (46th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-FIREFOXESR-17764950
  • published1 Jul 2026
  • disclosed25 Oct 2023

Introduced: 25 Oct 2023

CVE-2023-5722  (opens in a new tab)
CWE-203  (opens in a new tab)

How to fix?

Upgrade Chainguard firefox-esr to version 119.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Using iterative requests an attacker was able to learn the size of an opaque response, as well as the contents of a server-supplied Vary header. This vulnerability affects Firefox < 119.

CVSS Base Scores

version 3.1