Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen — WID-SEC-2026-2911

Summary

Firefox ist ein Open Source Web Browser. ESR ist die Variante mit verlängertem Support. Thunderbird ist ein Open Source E-Mail Client.

Timeline

Published by source

2026-08-19

Last source activity

2026-09-29

Time from publication to latest source activity

41 days

Risk context

• Reported severity or threat level: high.

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

WID-SEC-2026-2911

Source

BSI

Published by source

2026-08-19

Last source activity

2026-09-29

Additional identifiers

CVE-2026-74934

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.