Traefik v3.7.12 deprecates the previously introduced underscoreHeadersStrategy entrypoint option and introduces a new one called aliasHeadersStrategy that rejects even more potentially spoofed headers - not just with underscores.
Reminder to adjust your Traefik config.
urg its hypocritical of me to say so but I groaned when I saw the branch name starts with claude/xxx
dammn perverts those devs!