Is CVE-2022-26386 in the CISA KEV catalog?

No. CVE-2022-26386 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-26386?

CVE-2022-26386 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2022-26386?

CVE-2022-26386 has an EPSS score of 0.68% (48th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-26386?

Upgrade firefox-esr on debian 11 to 91.7.0esr-1~deb11u1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2022-26386

MEDIUM

6.5

CVSS v3

NVD

Description

Previously Firefox for macOS and Linux would download temporary files to a user-specific directory in /tmp , but this behavior was changed to download them to /tmp where they could be affected by other local users. This behavior was reverted to the original, user-specific directory. *This bug only affects Firefox for macOS and Linux. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 91.7 and Thunderbird < 91.7.

CWE-377

How to fix

Remediation Available

firefox-esrDebian

Fixed in:91.7.0esr-1~deb11u1CVE-2022-26386

Fixed in:91.7.0esr-1CVE-2022-26386

thunderbirdUbuntu

Fixed in:1:91.7.0+build2-0ubuntu0.18.04.1USN-5345-1

Fixed in:1:91.7.0+build2-0ubuntu0.20.04.1USN-5345-1

Mozilla Firefox ESR (en-US)Windows application

Affected:91.7Fixed in:91.7Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:91.7Fixed in:91.7Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Exploit Intelligence

0.68%probability of exploitation in 30 days

48thpercentile

Moderate risk: more likely to be exploited than 48% of all known CVEs.

References

Exploit1

bugzilla.mozilla.org

Vendor Advisory2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-04-15.