CVE & CISA-KEV CatalogNVD
CVE-2026-1642
MEDIUM5.9
CVSS v3
Description
A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers. An attacker with a man-in-the-middle (MITM) position on the upstream server side—along with conditions beyond the attacker's control—may be able to inject plain text data into the response from an upstream proxied server. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
How to fix
Remediation Available
nginxDebian
Fixed in:1.18.0-6.1+deb11u6CVE-2026-1642
Fixed in:1.22.1-9+deb12u4CVE-2026-1642
Fixed in:1.26.3-3+deb13u2CVE-2026-1642
Fixed in:1.28.1-3CVE-2026-1642
nginxRed Hat / RHEL
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
nginxRocky
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
nginx-all-modulesRed Hat / RHEL
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.module+el9.7.0+24008+f3da7534.noarch::nginx:1.26RHSA-2026:4235
Fixed in:1:1.24.0-4.module+el9.6.0+24139+44cdd49a.1.noarch::nginx:1.24RHSA-2026:6302
Fixed in:1:1.24.0-1.module+el9.4.0+24149+3a2a68ad.3.noarch::nginx:1.24RHSA-2026:6407
Fixed in:1:1.24.0-2.module+el8.10.0+24013+f603d2af.noarch::nginx:1.24RHSA-2026:5581
Fixed in:2:1.26.3-1.module+el9.6.0+24147+8a39592f.1.noarch::nginx:1.26RHSA-2026:6427
Fixed in:1:1.24.0-5.module+el9.7.0+24009+e763bdd7.1.noarch::nginx:1.24RHSA-2026:3638
nginx-all-modulesRocky
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.module+el9.6.0+24147+8a39592f.1.noarch::nginx:1.26RHSA-2026:6427
Fixed in:1:1.24.0-5.module+el9.7.0+24009+e763bdd7.1.noarch::nginx:1.24RHSA-2026:3638
Fixed in:1:1.24.0-1.module+el9.4.0+24149+3a2a68ad.3.noarch::nginx:1.24RHSA-2026:6407
Fixed in:1:1.24.0-4.module+el9.6.0+24139+44cdd49a.1.noarch::nginx:1.24RHSA-2026:6302
Fixed in:1:1.24.0-2.module+el8.10.0+24013+f603d2af.noarch::nginx:1.24RHSA-2026:5581
Fixed in:2:1.26.3-2.module+el9.7.0+24008+f3da7534.noarch::nginx:1.26RHSA-2026:4235
nginx-coreRed Hat / RHEL
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
nginx-coreRocky
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
nginx-core-debuginfoRocky
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
nginx-core-debuginfoRed Hat / RHEL
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
nginx-debuginfoRed Hat / RHEL
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
nginx-debuginfoRocky
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
nginx-debugsourceRocky
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
nginx-debugsourceRed Hat / RHEL
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
nginx-filesystemRocky
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.module+el9.7.0+24008+f3da7534.noarch::nginx:1.26RHSA-2026:4235
Fixed in:1:1.24.0-5.module+el9.7.0+24009+e763bdd7.1.noarch::nginx:1.24RHSA-2026:3638
Fixed in:1:1.24.0-4.module+el9.6.0+24139+44cdd49a.1.noarch::nginx:1.24RHSA-2026:6302
Fixed in:1:1.24.0-2.module+el8.10.0+24013+f603d2af.noarch::nginx:1.24RHSA-2026:5581
Fixed in:1:1.24.0-1.module+el9.4.0+24149+3a2a68ad.3.noarch::nginx:1.24RHSA-2026:6407
Fixed in:2:1.26.3-1.module+el9.6.0+24147+8a39592f.1.noarch::nginx:1.26RHSA-2026:6427
nginx-filesystemRed Hat / RHEL
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:1:1.24.0-4.module+el9.6.0+24139+44cdd49a.1.noarch::nginx:1.24RHSA-2026:6302
Fixed in:1:1.24.0-1.module+el9.4.0+24149+3a2a68ad.3.noarch::nginx:1.24RHSA-2026:6407
Fixed in:2:1.26.3-2.module+el9.7.0+24008+f3da7534.noarch::nginx:1.26RHSA-2026:4235
Fixed in:1:1.24.0-2.module+el8.10.0+24013+f603d2af.noarch::nginx:1.24RHSA-2026:5581
Fixed in:2:1.26.3-1.module+el9.6.0+24147+8a39592f.1.noarch::nginx:1.26RHSA-2026:6427
Fixed in:1:1.24.0-5.module+el9.7.0+24009+e763bdd7.1.noarch::nginx:1.24RHSA-2026:3638
nginx-mod-develRed Hat / RHEL
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
nginx-mod-develRocky
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
nginx-mod-http-image-filterRocky
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
nginx-mod-http-image-filterRed Hat / RHEL
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
nginx-mod-http-image-filter-debuginfoRocky
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
nginx-mod-http-image-filter-debuginfoRed Hat / RHEL
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
nginx-mod-http-perlRocky
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
nginx-mod-http-perlRed Hat / RHEL
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
nginx-mod-http-perl-debuginfoRed Hat / RHEL
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
nginx-mod-http-perl-debuginfoRocky
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
nginx-mod-http-xslt-filterRed Hat / RHEL
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
nginx-mod-http-xslt-filterRocky
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
nginx-mod-http-xslt-filter-debuginfoRed Hat / RHEL
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
nginx-mod-http-xslt-filter-debuginfoRocky
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
nginx-mod-mailRed Hat / RHEL
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-1.el10_0.3RHSA-2026:6311
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
Fixed in:2:1.26.3-2.el10_1RHSA-2026:4705
This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
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 ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Exploit Intelligence
0.34%probability of exploitation in 30 days
27thpercentile
Low risk: more likely to be exploited than 27% of all known CVEs.
References
Vendor Advisory1
Third-Party Advisory1
Related Vulnerabilities
Other CWE-349 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2019-9535 | Critical | 9.8 | 2.5% | - | - |
| CVE-2026-32162 | High | 8.4 | 2.0% | - | Fix |
| CVE-2018-1131 | High | 8.8 | 1.3% | - | - |
| CVE-2021-21374 | High | 8.1 | 1.0% | - | Fix |
| CVE-2024-21094 | Low | 3.7 | 0.8% | - | Fix |
| CVE-2025-40778 | High | 8.6 | 0.7% | - | Fix |
Common questions
How do I fix CVE-2026-1642?
Published advisories record a fix for 73 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2026-1642 being actively exploited?
Not that we know of. CVE-2026-1642 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.34% is the estimated probability that it will be exploited in the next 30 days. That is higher than 27% of all scored CVEs.
How severe is CVE-2026-1642?
CVE-2026-1642 has a CVSS v3 base score of 5.9, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-1642 affect?
Published advisories record a fix for nginx (Debian), nginx (Red Hat / RHEL), nginx (Rocky), nginx-all-modules (Red Hat / RHEL), and 69 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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<a href="https://tridentstack.com/cve/CVE-2026-1642"><img src="https://tridentstack.com/cve/badge/CVE-2026-1642.svg" alt="CVE-2026-1642"></a>Find and fix vulnerabilities across your fleet
TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.
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 2026-02-13.