CVE-2026-42849

criticalpriority · track · 0EPSS 0.004 · 29 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.36% (29th) EPSS

CVSS 9.3 · critical

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-27

authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, due to the implementation of stages in the SFE (Simple Flow Executor) in order to make the interface more compatible with legacy browsers, it was possible to use an XSS exploit in the AutosubmitStage. This issue has been patched in versions 2025.12.5 and 2026.2.3.

cvss

Technical severity, 0–10. One row per scoring source.

9.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.5–9.3

v3.19.3criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:Nsecondary · ENISA EU

v3.19.3criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:Nsecondary · security-advisories@github.comexploitability 2.8 · impact 5.8

v3.18.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79US

affected products (6)

Products and version ranges known to be affected.

goauthentik authentik≤ < 2025.12.5enisa_euvdEU
goauthentik authentik≤ < 2026.2.3enisa_euvdEU
goauthentik authentik< 2025.12.5nvdUScpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*
goauthentik authentik2026.2.0 → 2026.2.3nvdUScpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*
Bitnami authentik< 2025.12.5osvUSpkg:bitnami/authentik
Bitnami authentik2026.0.0 → 2026.2.3osvUSpkg:bitnami/authentik

advisories (1)

Vendor and ecosystem advisories describing this.

BIT-authentik-2026-42849authentik: Reflected XSS in SFE AutosubmitStage allows IDP account takeover2026-06-05vendor · osvUS
authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, due to the implementation of stages in the SFE (Simple Flow Executor) in order to make the interface more compatible with legacy browsers, it was possible to use an XSS exploit in the AutosubmitStage. This issue has been patched in versions 2025.12.5 and 2026.2.3.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

published 2026-06-02modified 2026-07-22

references (5)

External citations — patches, advisories, analysis.

scry

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