Red Hat Firefox 140.17 Updates Fix 43 CVEs
Tech GuruQuick Answer
Red Hat issued Firefox 140.17 updates for RHEL 8.8 E4S or TUS and RHEL 9.6 EUS. Inventory managed browsers and exact streams, install the matching package, restart active sessions, validate enterprise policy and applications, and retain evidence.
Confirm Scope And Apply The Supported Remediation
What to do now: Inventory RHEL 8.8 E4S or TUS and RHEL 9.6 EUS workstations and servers with Firefox, exact packages, managed policies, active users, owners, and repositories. Match the host subscription stream to RHSA-2026:92327 or RHSA-2026:92335; do not treat these package builds as targets for unrelated RHEL channels. Install firefox-140.17.0-1 from the matching signed Red Hat repository and restart Firefox so active processes load the fixed browser. Confirm package and process versions, test authentication, proxies, certificates, extensions and critical web applications, monitor regressions, and retain change evidence.
Last verified: 2026-10-29 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | Firefox 140.17 on RHEL 8.8 E4S or TUS and RHEL 9.6 EUS |
|---|---|
| Advisory | RHSA-2026:92327 / RHSA-2026:92335 |
| CVEs | CVE-2026-100756, CVE-2026-100757, CVE-2026-100758, CVE-2026-100759, CVE-2026-100762, CVE-2026-100766, CVE-2026-100767, CVE-2026-100769, CVE-2026-100770, CVE-2026-100771, CVE-2026-100772, CVE-2026-100773, CVE-2026-100774, CVE-2026-100775, CVE-2026-100776, CVE-2026-100777, CVE-2026-100778, CVE-2026-100779, CVE-2026-100780, CVE-2026-100781, CVE-2026-100782, CVE-2026-100783, CVE-2026-100784, CVE-2026-100785, CVE-2026-100786, CVE-2026-100788, CVE-2026-100789, CVE-2026-100790, CVE-2026-100791, CVE-2026-100792, CVE-2026-100794, CVE-2026-100797, CVE-2026-100801, CVE-2026-100803, CVE-2026-100807, CVE-2026-100811, CVE-2026-100818, CVE-2026-100819, CVE-2026-100820, CVE-2026-100821, CVE-2026-100832, CVE-2026-92035, CVE-2026-96869 |
| Authoritative release date | 2026-10-29 10:30:32 UTC |
| Authority revision date | 2026-10-29 11:00:06 UTC |
| Affected versions | Advisory-listed Firefox builds on RHEL 8.8 E4S or TUS and RHEL 9.6 EUS before firefox-140.17.0-1 on the corresponding stream. |
| Fixed version | firefox-140.17.0-1.el8_8 or firefox-140.17.0-1.el9_6 from the matching Red Hat repository |
| CVSS base score | 6.1-7.5 (CVSS v3.1) |
| CVSS severity | Important |
| Exploitation status | Red Hat does not state that these vulnerabilities are being maliciously exploited.; no exploitation claim is inferred. |
What Changed
Red Hat updated Firefox on RHEL 8.8 and 9.6 extended streams for 43 browser and platform vulnerabilities.
What To Validate Now
- Inventory. Inventory RHEL 8.8 E4S or TUS and RHEL 9.6 EUS workstations and servers with Firefox, exact packages, managed policies, active users, owners, and repositories.
- Establish applicability. Match the host subscription stream to RHSA-2026:92327 or RHSA-2026:92335; do not treat these package builds as targets for unrelated RHEL channels.
- Remediate. Install firefox-140.17.0-1 from the matching signed Red Hat repository and restart Firefox so active processes load the fixed browser.
- Validate. Confirm package and process versions, test authentication, proxies, certificates, extensions and critical web applications, monitor regressions, and retain change evidence.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
Updating the package does not replace already running browser processes. Coordinate session restarts and test enterprise policy, extensions and legacy applications.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
