4.3

CVE-2022-26382: mozilla firefox Observable Discrepancy

CVSS: 4.3v3.1MediumModified
AliasesUBUNTU-CVE-2022-26382
Published 22-12-2022Last modified 16-04-2025
Open JSON

Vulnerability summary

CVE-2022-26382 is a medium (CVSS 4.3) Observable Discrepancy vulnerability in mozilla firefox. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 41.1% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
27/100
0100
Medium · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.49%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
OPENSUSE-SU-2024:11908-1OPENSUSE-SU-2024:14572-1USN-5321-1USN-5321-2

Timeline

  1. 22-12-2022
    PublishedVulnerability first disclosed.
  2. 16-04-2025
    Last modifiedVulnerability information updated.

Description

While the text displayed in Autofill tooltips cannot be directly read by JavaScript, the text was rendered using page fonts. Side-channel attacks on the text by using specially crafted fonts could have lead to this text being inferred by the webpage. This vulnerability affects Firefox < 98.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.49%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

0.00 pp

From 0.49% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.49%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugzilla.mozilla.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Mozilla1 product
  • firefox≥ unspecified, < 98 | < 98.0
Ubuntu1 product
  • firefox< 98.0+build3-0ubuntu0.18.04.2 | < 98.0+build3-0ubuntu0.20.04.2 | < 1:1snap1-0ubuntu1

2 vendors · 2 products

References

7 links