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[v15] Explicitly set the session cookie to SameSite=Lax #50108

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merged 1 commit into from
Dec 13, 2024

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@zmb3 zmb3 commented Dec 11, 2024

Backport #50097 to branch/v15

Prior to this change, we were not explicitly setting the SameSite
mode for our session cookie, which leaves the behavior up to the
browser.

Chromium-based browsers have been defaulting to SameSite=Lax since
Chrome 80 in February 2020, so this is not a behavior change but
rather locking in today's behavior and being explicit about it.

Note that this is for Teleport's session cookie only. App session
cookies remain using SameSite=None because the proxied app may
itself be using SSO, and we need the app session cookie to make
its way through SSO redirects.
@zmb3 zmb3 added the no-changelog Indicates that a PR does not require a changelog entry label Dec 11, 2024
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@zmb3 zmb3 added this pull request to the merge queue Dec 13, 2024
Merged via the queue into branch/v15 with commit bb9525c Dec 13, 2024
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@zmb3 zmb3 deleted the bot/backport-50097-branch/v15 branch December 13, 2024 20:42
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3 participants