CVE-2026-45273
Authenticated users can overwrite server config and secrets, enabling RCE risk.
Is CVE-2026-45273 being exploited?
Not confirmed. CVE-2026-45273 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.52% probability of exploitation in the next 30 days.
How severe is CVE-2026-45273?
CVE-2026-45273 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-45273?
Yes. A fix has been recorded for CVE-2026-45273. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-45273 affect?
CVE-2026-45273 affects MyBooks (Talebook) webserver <= 3.41.2, /api/admin/settings POST AdminSettings.post, process_auth_header auth flow. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-45273?
Upgrade to 3.42.0; rotate secrets; restrict admin access; audit logs
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated users (incl. unactivated accounts) can overwrite config, exfiltrate/replace secrets, change behavior, force restarts, and enable code-injection leading to RCE.
Immediate action required
- affected< 3.42.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.