CA/Browser Forum

Welcome to the CA/Browser Forum

The Certification Authority Browser Forum (CA/Browser Forum) is a voluntary gathering of Certificate Issuers and suppliers of Internet browser software and other applications that use certificates (Certificate Consumers).

More information for about the forum and information for Site Owners, Developers, Auditors and Assessors, and Potential Members can be found in the About section of this website.

Recent posts

Ballot CSC-32: Make a Reserved Policy OID mandatory
June 16, 2026 by The Intellectual Property Review (IPR) period for Ballot CSC-32 (Ballot CSC-32: Make a Reserved Policy OID mandatory) has completed. No IPR Exclusion Notices were filed, and the ballot is adopted as of November 17, 2025. The new CSC BRs v3.10.0 have been published to the CABF public website in accordance with the Bylaws: https://cabforum.org/uploads/CA-Browser-Forum-CSCBR-3.11.0.pdf IPR Review of Ballot CSC-32: Make a Reserved Policy OID mandatory This Review Notice is sent pursuant to Section 4.1 of the CA/Browser Forum’s Intellectual Property Rights Policy (v1.3). This Review Period of 30 days is for one Final Maintenance Guidelines. The complete Draft Maintenance Guideline that is the subject of this Review Notice is attached to this email.
Ballot SC087v2: Registration Number Improvement for EV Certificates
June 3, 2026 by Voting Results Certificate Issuers 18 votes in total:
2026-05-21 Minutes of the Server Certificate Working Group
May 21, 2026 by Wayne ThayerMinutes: 1. Begin Recording - Roll Call Meeting called to order by Dimitris Zacharopoulos.
More posts of the CA/Browser Forum
Latest releases
Server Certificate Requirements
SC098: Process RFC 8657 CAA Parameters - Jun 16, 2026

Code Signing Requirements
v3.8 - Aug 5, 2024

What’s Changed CSC-25: Import EV Guidelines to CS Baseline Requirements by @dzacharo in https://github.com/cabforum/code-signing/pull/38 Full Changelog: https://github.com/cabforum/code-signing/compare/v3.7...v3.8

S/MIME Requirements
v1.0.14 - Ballot SMC016 - May 5, 2026

This ballot maintains consistency between the S/MIME Baseline Requirements and the TLS Baseline Requirements with changes introduced by Ballots SC096 and SC097. Specifically, this ballot: Creates a carve-out of the logging requirements for DNSSEC specifically, stating these are not in scope. For audit purposes, change management logging is able to confirm if the appropriate controls are in effect or not. Sunsets all remaining use of SHA-1 signatures in Certificates and CRLs. It is noted that most uses of SHA-1 signatures are already deprecated by SC097. With this ballot, all unexpired Subordinate CA Certificates issuing S/MIME containing the SHA-1 signature algorithm must be revoked. This proposal does not prohibit the use of SHA-1 to generate issuerKeyHash or issuerNameHash values as currently required by RFC 5019. Includes minor formatting corrections.

Network and Certificate System Security Requirements
Version 2.0.5 (Ballot NS-008) - Jul 9, 2025

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The Certification Authority Browser Forum (CA/Browser Forum) is a voluntary gathering of Certificate Issuers and suppliers of Internet browser software and other applications that use certificates (Certificate Consumers).