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GitHub (github.com): Post-Quantum TLS Check

Does GitHub (github.com) support post-quantum TLS 1.3 with X25519MLKEM768?

No. In our latest test on , github.com did not negotiate a post-quantum key exchange; the server chose X25519, a classical key exchange. Observed Source · Methodology

What this means for you

In our TLS 1.3 test of github.com on Oct 18, 2026, we offered the hybrid X25519MLKEM768 group and the server chose X25519, so that connection used only classical key exchange.

For your own site, the key exchange is decided by whatever ends the TLS connection (your web server, your host or your CDN): our hosting checker names the provider behind a domain, and our hosting price tracker shows what the plans we check cost at purchase and at renewal.

We also read which AI crawlers github.com asks to stay away in its robots.txt: the github.com rules and their history.

History and how we checked

30 checks since Sep 27, 2026 · no change

How we got this number

  • What we tested: a TLS 1.3 connection to github.com; we record the key exchange the server chooses. Source: github.com
  • Checked: ; tracked since Sep 27, 2026
  • Shown in: Switzerland
  • Checks so far: 30 checks on 22 days since Sep 27, 2026
  • What changed: no change since Sep 27, 2026
  • Page updated:

Changes

  1. — First check: No
Record history 30 records for 1 question
Last record
Shown in
Switzerland
TimeValueStatus
Oct 18, 2026NoObserved
Oct 17, 2026NoObserved
Oct 16, 2026NoObserved
Oct 15, 2026NoObserved
Oct 14, 2026NoObserved
Oct 13, 2026NoObserved
Oct 12, 2026NoObserved
Oct 11, 2026NoObserved
Oct 10, 2026NoObserved
Oct 9, 2026NoObserved
Oct 8, 2026NoObserved
Oct 7, 2026NoObserved
Oct 6, 2026NoObserved
Oct 5, 2026NoObserved
Oct 4, 2026NoObserved
Oct 3, 2026NoObserved
Oct 2, 2026NoObserved
Oct 1, 2026NoObserved
Sep 30, 2026NoObserved
Sep 29, 2026NoObserved
Sep 28, 2026NoObserved
Sep 28, 2026NoObserved
Sep 28, 2026NoObserved
Sep 28, 2026NoObserved
Sep 28, 2026NoObserved
Sep 28, 2026NoObserved
Sep 27, 2026NoObserved
Sep 27, 2026NoObserved
Sep 27, 2026NoObserved
Sep 27, 2026NoObserved
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