Caddy Files

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

• [88616e] api: Add all in-flight requests /reverse_proxy/upstreams (Fixes [#7277]) (#7517)
• [d935a6] autohttps: Ensure CertMagic config is recreated after autohttps runs (#7510)
• [5d20ad] build(deps): bump github.com/smallstep/certificates (#7535)
• [9371ee] build(deps): bump the actions-deps group across 1 directory with 12 updates (#7536)
• [9798f6] caddyhttp: Avoid nil pointer dereference in proxyWrapper (#7521)
• [dc3608] caddyhttp: Collect metrics once per route instead of per handler (#7492)
• [174fa2] caddyhttp: Evaluate tls.client placeholders more accurately (fix [#7530]) (#7534)
• [eac02e] caddyhttp: Limit empty Host check to HTTP/1.1
• [f28306] cmd: Custom binary names through CustomBinaryName and CustomLongDescription (#7513)
• [cd9e16] cmd: Pass configFile, not configFlag, for reload command (#7532)
• [7b34e3] core: Check whether @id is unique (#7002)
• [566e71] fileserver: document hide case-sensitivity (F-CADDY-FILESERVER-HIDE-CASE-001) (#7548)
• [2dd385] fix(caddyfile): Prevent parser to panic when no token were added by empty {block} (#7543)
• [2dbcde] forward_auth: copy_headers does not strip client-supplied identity headers (Fixes GHSA-7r4p-vjf4-gxv4) (#7545)
• [ce203a] go.mod: Upgrade x/net
• [76b198] http: Sort auto-HTTPS redirect routes by host specificity (fixes [#7390]) (#7502)
• [7ffb64] httpcaddyfile: Fix missing TLS connection policies when auto_https is default (#7325) (#7507)
• [45cf61] logging: Ensure slog error level logs don't print stack traces (#7512)
• [987375] logging: Support zstd roll compression (#7515)
• [294dff] logging: add DirMode options and propagate FileMode to rotations (#7335)
• [a6acb3] proxyproto: Generated test coverage (#7540)
• [11b56c] reverseproxy: Fix health_port being ignored in health checks (#7533)
• [db2986] reverseproxy: Track dynamic upstreams, enable passive healthchecking (#7539)
• [d7b21c] reverseproxy: fix tls dialing w/ proxy protocol (#7508)
• [a5e7c6] reverseproxy: prevent body close on dial-error retries (#7547)
• [2ab043] reverseproxy: query escape request urls when proxy protocol is enabled (#7537)
• [fbfb8f] rewrite: Force recomputing path when escaped path matches rewrite target
• [f145bc] tls: Add tls_resolvers global option for DNS challenge configuration (#7297)