VulnSocial

CVE-2026-42849Patch(goauthentik / authentik)

LOWCVSS 9.3 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch goauthentik authentik systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

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.

goauthentik CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-79

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • authentik

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 3 signals
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 2 mentions (2026-06-03); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
goauthentik
Products
authentik

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-06-03: 2Mentions · 2026-07-25: 1Patch / Workaround · 2026-06-03: 1Patch / Workaround · 2026-07-25: 1Technical Details · 2026-06-03: 2Technical Details · 2026-07-25: 106-0307-25
Signal classification2 categories
Patch
266.7%
Disclosure
133.3%
Referenced assets2 URLs
By indicator
Classification over time
DateTotalLabels
2026-06-032
Disclosure1Patch1
2026-07-251
Patch1
Full discourse3 posts
  • DFIR Lab@DFIR_Lab
    Patch

    🚨 CRITICAL: CVE-2026-42849 (CVSS 9.3) authentik identity provider vulnerable to XSS in AutosubmitStage via SFE implementation. ✅ Patch NOW to v2025.12.5 or v2026.2.3 #CVE #Vulnerability #PatchNow #ThreatIntel https://t.co/Px5dKhU4O4

    Post summary

    Authentik identity provider suffers a critical XSS flaw (CVE‑2026‑42849), with a high‑CVSS score; users are urged to patch to v2025.12.5 or v2026.2.3 immediately.

    0000039
    96 followersView on X
  • Infoflowcloud@infoflowcloud
    Patch

    🚨*CVE* CVE-2026-42849 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 orde… https://www.cve.org/CVERecord?id=CVE-2026-42849 ----- Traducción: CVE-2026-42849 aut… http://infoflow.cloud`

    Post summary

    The post notes that CVE-2026-42849 was fixed in authentik versions 2025.12.5 and 2026.2.3, providing limited technical detail about the affected component but no evidence of PoC, exploits, or active attacks.

    0000036
    79 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-42849 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 orde… https://www.cve.org/CVERecord?id=CVE-2026-42849

    Post summary

    The post references CVE-2026-42849 in authentik, noting affected versions and a brief technical detail about the flaw, but provides no PoC, exploit, or patch information.

    00000235
    57.6K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appgoauthentikauthentik---

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