CVE-2026-21089 6.9 medium EPSS 0.2%
Improper input validation in removing style tag in libsubextractor.so prior to SMR Sep-2026 Release 1 allows local attackers to write out-of-bounds memory.
Severity
CVSS 4.0 6.9 medium CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:L/SC:N/SI:N/SA:NEnable JavaScript to see the metric table and diagram.
CVSS 3.1 7.8 high CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HEnable JavaScript to see the metric table and diagram.
EPSS 0.2% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-31)
CWE CWE-20
Published 2026-09-09
Modified 2026-09-10
Record from the NVD, synced 2026-10-19 Affected References Check your stack JSON