Is CVE-2020-26963 in the CISA KEV catalog?

No. CVE-2020-26963 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-26963?

CVE-2020-26963 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2020-26963?

CVE-2020-26963 has an EPSS score of 0.84% (53th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-26963?

Upgrade firefox on debian unstable to 83.0-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2020-26963

MEDIUM

4.3

CVSS v3

NVD

Description

Repeated calls to the history and location interfaces could have been used to hang the browser. This was addressed by introducing rate-limiting to these API calls. This vulnerability affects Firefox < 83.

How to fix

Remediation Available

firefoxDebian

Fixed in:83.0-1CVE-2020-26963

firefoxUbuntu

Fixed in:83.0+build2-0ubuntu0.16.04.3USN-4637-2

Fixed in:83.0+build2-0ubuntu0.18.04.2USN-4637-1

Fixed in:83.0+build2-0ubuntu0.20.04.1USN-4637-1

DeveloperEditionWindows application

Affected:83.0Fixed in:83.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:83.0Fixed in:83.0Mozilla

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

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

0.84%probability of exploitation in 30 days

53rdpercentile

Moderate risk: more likely to be exploited than 53% of all known CVEs.

References

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 2024-11-21.