TLS/SSL Certificate Lifetimes Are Getting Shorter — and Renewal Risk Is Rising
The TLS/SSL ecosystem is entering a fundamental transformation. Certificate authorities (CAs) and browser platforms are enforcing shorter SSL/TLS certificate lifetimes and eliminating risky extended key usage (EKU) combinations, and changing domain validation mechanisms — dramatically changing how enterprises must manage certificate renewal.
For global organizations managing thousands of certificates across brands, domains, and applications, this creates an urgent need for automated TLS/SSL certificate lifecycle management.
Without automation and centralized control, expired SSL certificates will become far more common — and far more damaging to your brand’s online reputation.
What Is Changing in SSL/TLS Certificate Validity?
Starting on February 23, 2026, public TLS/SSL certificates purchased through Markmonitor will no longer be issued beyond 199 days. Certificate authorities will enforce shorter lifespans according to the following schedule:
| Effective Date | Maximum TLS/SSL Lifetime |
| Feb 23, 2026 | 200 days |
| Mar 2027 | 100 days |
| Mar 2029 | 47 days |
Why Shorter Certificate Lifetimes Increase Business Risk
Shorter lifetimes are designed to improve security, but they also create risk for organizations that rely on manual processes.
If you miss a certificate renewal in this new model:
- Websites break in most browsers
- APIs and SaaS platforms fail
- Customer trust is damaged
- Compliance violations occur
- IT/Security is alerted far more often (and they deserve a night’s rest)
Without automated certificate lifecycle management, an expired SSL certificate will no longer be a rare event — it’s an inevitability. Learn how to avoid expired SSL certificates with Markmonitor automation.
Extended Key Usage (EKU) Is Also Changing
Certificate validity is not the only disruption. Extended Key Usage (EKU) rules are also being rewritten.
Beginning May 1, 2026, browsers will no longer trust certificates that include both:
- Server Authentication EKU
- Client Authentication EKU
This means certificates used for mutual TLS (mTLS) — where systems authenticate each other — must now be issued as dedicated Client Auth EKU certificates that are not trusted by web browsers.
Historically, many enterprises used a single certificate for both server authentication and client authentication. Under the new EKU rules, that model no longer works.
Solutions for Mutual TLS or Server-to-Server Authentication
Enterprises have a few options if they rely on the server checking for the client’s certificate:
- Use private PKI – private public key infrastructure using self-signed certificates
- Use an alternate root – such as publicly issued X9 certificates
Both options require installing additional root and intermediate certificates on both clients and servers.
Choosing an X9 certificate allows interoperability with other enterprises using the same X9 key infrastructure. Markmonitor offers X9 certificates.
Learn more at: https://www.digicert.com/solutions/x9-pki-security-solutions
Validation Changes – Domain Name System Security Extensions (DNSSEC)
Starting February 24, 2026, some certificate authorities will validate DNSSEC, if enabled, when verifying domain control and performing Certification Authority Authorization (CAA) checks.
DNSSEC is NOT REQUIRED for domain validation or certificate issuance. It is an optional DNS configuration that can be set up through your DNS provider.
Most enterprises using DNSSEC have already performed validation of DNS authentication.
Validation Changes – Multi-Perspective Issuance Corroboration (MPIC)
Certificate Authorities use Multi-Perspective Issuance Corroboration (MPIC) to validate a domain’s legitimacy by checking DCV and CAA records from multiple network locations.
Starting February 24, 2026, some certificate authorities will update MPIC to enforce corroboration using at least three remote network locations (up from two) from at least two different Regional Internet Registry regions. Adding an additional remote location further reduces the risk of routing manipulation by bad actors during certificate issuance.
No action is necessary to validate domain ownership during certificate issuance. This industry change simply enhances security and reliability for everyone.
What These Changes Mean for Certificate Lifecycle Management
Together, these changes force a shift from certificate ownership to certificate operations.
Enterprises must now manage:
- Continuous renewal
- Multiple certificate profiles (Server vs Client Auth EKU)
- Automated issuance and replacement
- Real-time visibility into expiring certificates
- Compliance across global brands and domains
This is why TLS/SSL certificate lifecycle management is becoming a core security discipline, not just an IT task.
Why Manual Certificate Renewal No Longer Works
With 200-day → 100-day → 47-day lifetimes, organizations will soon need to renew certificates every few weeks.
| Manual Cert Management | Markmonitor Assisted Lifecycle Management |
| Spreadsheets | Centralized inventory |
| Calendar reminders | Automated renewal |
| Human installs | Agent-based deployment |
| Risk of outages | Continuous compliance |
Without certificate automation, even one missed renewal can trigger outages, security alerts, or compliance failures.
How Markmonitor Helps Enterprises Stay Ahead
Markmonitor’s API allows enterprise-grade TLS/SSL certificate lifecycle management.
Our platform enables you to:
- Discover every certificate across all domains
- Order and renew certificates via API
- Enforce CA and browser policy compliance globally with applicable certificate types
Using Markmonitor’s Certificate Management API, enhanced by integrated 3rd party platforms, organizations can eliminate manual risk and ensure that every certificate renewal remains continuously compliant.
The Bottom Line: The SSL Industry Has Changed Forever
The shift to 200-day and eventually 47-day certificates, combined with EKU separation and validation changes, marks the biggest transformation in public trust in a decade.
Enterprises that do not modernize their TLS/SSL certificate lifecycle management will face:
- Expired certificates
- Service outages
- Security gaps
- Regulatory exposure
Those that automate will gain resilience, security, and operational control.
Talk to Markmonitor About Your Certificate Strategy
Now is the time to audit your SSL/TLS portfolio, identify Client Auth EKU usage, and prepare for shorter certificate lifetimes.
Markmonitor helps global enterprises manage domains, certificates, and security infrastructure in one unified platform.
Contact Markmonitor to future-proof your TLS/SSL certificate lifecycle management.
