CVE-2025-71435Published

Coder before 2.23.0 Session Expiration Bypass via OIDC Without Refresh Token

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2025-71435

Published

Coder before 2.23.0 contains a session expiration bypass vulnerability that allows authenticated users to retain access after OIDC token expiry when no refresh token is issued. Users can keep their APIKey cookie active through regular use, extending it every 24 hours to access Coder indefinitely after losing OIDC authorization.

Source published: 17 Oct 2026 18:46:07 UTC
Source modified: 19 Oct 2026 14:40:10 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS 3.1 · 4.2 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

euvd · EUVD-2025-211113

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Oct 17, 2026, 6:46:07 PM

dateUpdated: Oct 19, 2026, 2:40:10 PM

Source published: Oct 17, 2026, 6:46:07 PM (timezone not stated)
Source modified: Oct 19, 2026, 2:40:10 PM (timezone not stated)
Observed here: 7 Nov 2026 03:35:07 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 4.0 · 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

nvd · CVE-2025-71435

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Awaiting Analysis

Weakness classifications: CWE-613

Original publisher date fields

published: 2026-10-17T19:16:28.683

lastModified: 2026-10-24T19:10:00.127

Source published: 17 Oct 2026 19:16:28 UTC
Source modified: 24 Oct 2026 19:10:00 UTC
Observed here: 25 Oct 2026 04:17:18 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · [email protected] · Secondary · 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS 3.1 · [email protected] · Secondary · 4.2 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

osv · GHSA-3rw9-wmc8-8948

Published

### Summary If users log in to Coder via OIDC, and the OpenID Identity Provider does not return a refresh token, then Coder may allow their web session to continue beyond the expiration of the token returned by the OpenID Identity Provider. ### Details When a user logs in via OIDC, Coder stores the OIDC token and refresh token (if any) in its datastore and sets an APIKey in the user's cookies. If there is a refresh token, then when the OIDC token is expired and a request is made with the APIKey, we attempt to refresh the OIDC token. If refresh fails, the Coder API request is also failed and the user needs to log in again. However, if there is no refresh token provided, then affected versions of Coder fail to enforce the expiry of the OIDC token, and allow users to make API requests even if it is expired so long as their APIKey stored in cookies has not expired. Coder APIKeys have an expiry and lifetime of 24 hours, but Coder is configured to extend the lifetime of the APIKey by up to 24 hours from the time it is used successfully. So, an APIKey that is used at least once every 24 hours will not expire. (This behavior can be disabled by configuration). ### Impact This could allow a user to access the Coder service beyond the lifetime of the token issued by the OpenID provider, potentially indefinitely, even if they are no loner authorized via OIDC.

Source published: 28 Aug 2025 19:36:04 UTC
Source modified: 18 Oct 2026 10:55:50 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Publisher rating · LOW

osv · GO-2025-3921

Published

Coder accepts an APIKey beyond the linked OIDC expiry if there is no refresh token in github.com/coder/coder

Source published: 8 Sep 2025 14:13:10 UTC
Source modified: 18 Oct 2026 10:55:50 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.