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Fencer Intel
high 8.8

CVE-2026-49443 json

authentik: `UserSourceConnection.user` and `GroupSourceConnection.group` are changeable through the API

published 5mo ago modified 2mo ago also BIT-authentik-2026-49443 , EUVD-2026-34028 , GHSA-wr38-7xg8-fqxr

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits
0
none known

Summary

authentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, an attacker with the ability to change a source connection, and an account in one of the configured sources can log into any account. This issue has been patched in versions 2025.12.6, 2026.2.4, and 2026.5.1.

Patch / fix

  • bitnami authentik 2025.12.6, 2026.2.4, 2026.5.1
  • goauthentik authentik 2025.12.6, 2026.2.4, 2026.5.1

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CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
5mo ago

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-11).

Exploits and checks

  • github.com https://github.com/goauthentik/authentik/security/advisories/GHSA-wr38-7xg8-fqxr referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
bitnami authentik
<2025.12.6
>=2026.0.0, <2026.2.4
>=2026.3.0, <2026.5.1
2025.12.6
2026.2.4
2026.5.1

Affected products

  • goauthentik authentik

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.