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[GH-ISSUE #1845] ipv6 validation does not allow all ipv6 variantions #6820

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opened 2026-04-25 15:46:25 -05:00 by GiteaMirror · 2 comments
GiteaMirror commented 2026-04-25 15:46:25 -05:00
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Originally created by @LaurenceJJones on GitHub (Nov 11, 2025).
Original GitHub issue: https://github.com/fosrl/pangolin/issues/1845

d38b321f85/server/lib/validators.ts (L88)

The regex here is expecting a full 8-hextet IPv6 only. It wont allow these other variants of ipv6:

::1 (loopback, compressed)
2001:db8::1 (compressed zeros)
fe80::1%eth0 (zone ID)
::ffff:192.0.2.128 (IPv4-mapped)

Either we should expand the regex to handle all cases or switch over to ipaddr.js library for a more "battle tested" library but up to you!

Originally created by @LaurenceJJones on GitHub (Nov 11, 2025). Original GitHub issue: https://github.com/fosrl/pangolin/issues/1845 https://github.com/fosrl/pangolin/blob/d38b321f85ffdf7fc2ea22ed0f4d518d3baed12c/server/lib/validators.ts#L88 The regex here is expecting a full 8-hextet IPv6 only. It wont allow these other variants of ipv6: ``` ::1 (loopback, compressed) 2001:db8::1 (compressed zeros) fe80::1%eth0 (zone ID) ::ffff:192.0.2.128 (IPv4-mapped) ``` Either we should expand the regex to handle all cases or switch over to ipaddr.js library for a more "battle tested" library but up to you!
GiteaMirror added the stale label 2026-04-25 15:46:25 -05:00
GiteaMirror commented 2026-04-25 15:46:26 -05:00
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@AstralDestiny commented on GitHub (Nov 11, 2025):

Something like
/^(([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:)|([0-9A-Fa-f]{1,4}:){1,7}:|([0-9A-Fa-f]{1,4}:){1,6}:[0-9A-Fa-f]{1,4}|([0-9A-Fa-f]{1,4}:){1,5}(:[0-9A-Fa-f]{1,4}){1,2}|([0-9A-Fa-f]{1,4}:){1,4}(:[0-9A-Fa-f]{1,4}){1,3}|([0-9A-Fa-f]{1,4}:){1,3}(:[0-9A-Fa-f]{1,4}){1,4}|([0-9A-Fa-f]{1,4}:){1,2}(:[0-9A-Fa-f]{1,4}){1,5}|[0-9A-Fa-f]{1,4}:((:[0-9A-Fa-f]{1,4}){1,6})|:((:[0-9A-Fa-f]{1,4}){1,7}|:))$/

But that only covers full, compressed..

/^\[?((([0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4}|([0-9A-Fa-f]{1,4}:){1,7}:|([0-9A-Fa-f]{1,4}:){1,6}:[0-9A-Fa-f]{1,4}|([0-9A-Fa-f]{1,4}:){1,5}(:[0-9A-Fa-f]{1,4}){1,2}|([0-9A-Fa-f]{1,4}:){1,4}(:[0-9A-Fa-f]{1,4}){1,3}|([0-9A-Fa-f]{1,4}:){1,3}(:[0-9A-Fa-f]{1,4}){1,4}|([0-9A-Fa-f]{1,4}:){1,2}(:[0-9A-Fa-f]{1,4}){1,5}|[0-9A-Fa-f]{1,4}:(:[0-9A-Fa-f]{1,4}){1,6}|:((:[0-9A-Fa-f]{1,4}){1,7}|:)|(([0-9A-Fa-f]{1,4}:){6,6}|::ffff(:0{1,4}){0,1}:|64:ff9b:(:[0-9A-Fa-f]{1,4}){0,4}:)((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)\.){3}(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)))(%[0-9A-Za-z_.-]+)?\]?$/

Might do it, Might be missing some stuff but should be valid for the all valid entries for v6 but I might've missed some, but about to pass out, Thanks for remembering <3

<!-- gh-comment-id:3516578369 --> @AstralDestiny commented on GitHub (Nov 11, 2025): Something like `/^(([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:)|([0-9A-Fa-f]{1,4}:){1,7}:|([0-9A-Fa-f]{1,4}:){1,6}:[0-9A-Fa-f]{1,4}|([0-9A-Fa-f]{1,4}:){1,5}(:[0-9A-Fa-f]{1,4}){1,2}|([0-9A-Fa-f]{1,4}:){1,4}(:[0-9A-Fa-f]{1,4}){1,3}|([0-9A-Fa-f]{1,4}:){1,3}(:[0-9A-Fa-f]{1,4}){1,4}|([0-9A-Fa-f]{1,4}:){1,2}(:[0-9A-Fa-f]{1,4}){1,5}|[0-9A-Fa-f]{1,4}:((:[0-9A-Fa-f]{1,4}){1,6})|:((:[0-9A-Fa-f]{1,4}){1,7}|:))$/` But that only covers full, compressed.. `/^\[?((([0-9A-Fa-f]{1,4}:){7}[0-9A-Fa-f]{1,4}|([0-9A-Fa-f]{1,4}:){1,7}:|([0-9A-Fa-f]{1,4}:){1,6}:[0-9A-Fa-f]{1,4}|([0-9A-Fa-f]{1,4}:){1,5}(:[0-9A-Fa-f]{1,4}){1,2}|([0-9A-Fa-f]{1,4}:){1,4}(:[0-9A-Fa-f]{1,4}){1,3}|([0-9A-Fa-f]{1,4}:){1,3}(:[0-9A-Fa-f]{1,4}){1,4}|([0-9A-Fa-f]{1,4}:){1,2}(:[0-9A-Fa-f]{1,4}){1,5}|[0-9A-Fa-f]{1,4}:(:[0-9A-Fa-f]{1,4}){1,6}|:((:[0-9A-Fa-f]{1,4}){1,7}|:)|(([0-9A-Fa-f]{1,4}:){6,6}|::ffff(:0{1,4}){0,1}:|64:ff9b:(:[0-9A-Fa-f]{1,4}){0,4}:)((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)\.){3}(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)))(%[0-9A-Za-z_.-]+)?\]?$/ ` Might do it, Might be missing some stuff but should be valid for the all valid entries for v6 but I might've missed some, but about to pass out, Thanks for remembering <3
GiteaMirror commented 2026-04-25 15:46:27 -05:00
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@github-actions[bot] commented on GitHub (Nov 26, 2025):

This issue has been automatically marked as stale due to 14 days of inactivity. It will be closed in 14 days if no further activity occurs.

<!-- gh-comment-id:3578192962 --> @github-actions[bot] commented on GitHub (Nov 26, 2025): This issue has been automatically marked as stale due to 14 days of inactivity. It will be closed in 14 days if no further activity occurs.
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Reference: github-starred/pangolin#6820
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