Caddy 2.11.2 contains numerous bug fixes and enhancements! I know that's a lame summary but it's really all over the place.
Highlights
- Reverse proxy got a lot of love with certain edge cases related to PROXY protocol, health check port, and closing body on retries. Dynamic upstreams are now tracked which enables passive health checking.
- Performance improvements for metrics.
- New tls_resolvers global option to control DNS resolvers for all sites when using the ACME DNS challenge.
- Log rolling now supports zstd compression; deprecated roll_gzip, which will be removed in the future. Use roll_compression instead.
- Refined logging and some error messages.
- Fixed a bug in rewrite handler that could cause some URIs to not be rewritten when URI path is an escaped form of target path. Thanks to @MaherAzzouzi for the report.
Security fixes
This release fixes two CVEs.
- @NucleiAv reported a bug in the forward_auth directive that could permit identity injection and potential privilege escalation.
- @sammiee5311 reported that vars_regexp double-expanded placeholders, allowing some unusual configs to reveal secrets.
In addition:
- Built on Go 1.26.1 (also released today) which patches several CVEs.
- Our documentation has been updated to note that file system case sensitivity may affect the behavior of the hide option of the file_server handler.
Thank you to everyone who contributed, and for our ongoing sponsorships that make this development possible!
Changelog
- 88616e8 api: Add all in-flight requests /reverse_proxy/upstreams (Fixes #7277) (#7517)
- d935a69 autohttps: Ensure CertMagic config is recreated after autohttps runs (#7510)
- 5d20adc build(deps): bump github.com/smallstep/certificates (#7535)
- 9371ee6 build(deps): bump the actions-deps group across 1 directory with 12 updates (#7536)
- 9798f69 caddyhttp: Avoid nil pointer dereference in proxyWrapper (#7521)
- dc36082 caddyhttp: Collect metrics once per route instead of per handler (#7492)
- 174fa2d caddyhttp: Evaluate tls.client placeholders more accurately (fix #7530) (#7534)
- eac02ee caddyhttp: Limit empty Host check to HTTP/1.1
- f283062 cmd: Custom binary names through CustomBinaryName and CustomLongDescription (#7513)
- cd9e166 cmd: Pass configFile, not configFlag, for reload command (#7532)
- 7b34e31 core: Check whether @id is unique (#7002)
- 566e710 fileserver: document hide case-sensitivity (F-CADDY-FILESERVER-HIDE-CASE-001) (#7548)
- 2dd3852 fix(caddyfile): Prevent parser to panic when no token were added by empty {block} (#7543)
- 2dbcdef forward_auth: copy_headers does not strip client-supplied identity headers (Fixes GHSA-7r4p-vjf4-gxv4) (#7545)
- ce203aa go.mod: Upgrade x/net
- 76b198f http: Sort auto-HTTPS redirect routes by host specificity (fixes #7390) (#7502)
- 7ffb640 httpcaddyfile: Fix missing TLS connection policies when auto_https is default (#7325) (#7507)
- 45cf61b logging: Ensure slog error level logs don't print stack traces (#7512)
- 9873752 logging: Support zstd roll compression (#7515)
- 294dfff logging: add DirMode options and propagate FileMode to rotations (#7335)
- a6acb39 proxyproto: Generated test coverage (#7540)
- 11b56c6 reverseproxy: Fix health_port being ignored in health checks (#7533)
- db29860 reverseproxy: Track dynamic upstreams, enable passive healthchecking (#7539)
- d7b21c6 reverseproxy: fix tls dialing w/ proxy protocol (#7508)
- a5e7c6e reverseproxy: prevent body close on dial-error retries (#7547)
- 2ab043b reverseproxy: query escape request urls when proxy protocol is enabled (#7537)
- fbfb8fc rewrite: Force recomputing path when escaped path matches rewrite target
- f145bce tls: Add tls_resolvers global option for DNS challenge configuration (#7297)
