CVE-2021-36773
CVSS v3
7.5
HIGH
EPSS Score
1.3 %
exploit probability, as of 2026-10-19
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Get an alert for each new CVE published for mozilla-ublock-origin.
Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
- CVE-2021-36773 Red Hat Product Security
mozilla-ublock-origin: crafted web sites may cause a denial of service
Description
uBlock Origin before 1.36.2 and nMatrix before 4.4.9 support an arbitrary depth of parameter nesting for strict blocking, which allows crafted web sites to cause a denial of service (unbounded recursion that can trigger memory consumption and a loss of all blocking functionality).
Technical details
- Published
- 2021-07-18
Frequently asked questions
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