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VulnerabilityPublished

CVE-2026-73191: Apache Syncope · Open Redirect

Affects syncope-coreSource GCVE Database

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Authoritative record:CVE-2026-73191· Medium 6.1

Not known to be exploited · CVSS 6.1 Medium · fixed in 4.0.8 : update syncope-core when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
6.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 23% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.0.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Mavenorg.apache.syncope/syncope-corepkg:maven/org.apache.syncope/syncope-coreOther threatsAffected
  • 3.0.0-M0 – 4.1.2
6 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade Apache Syncope to versions 4.0.8 or 4.1.3, which contain fixes for this vulnerability. No other mitigation or temporary workaround is indicated in the provided data. Patch status is confirmed by the vendor advisory information.

Description

Apache Syncope versions from 3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.7, and 4.1.0-M0 through 4.1.2 contain an Open Redirect vulnerability when configured for CAS authentication. The vulnerability arises because the target Apereo CAS instance URL is determined by untrusted client-supplied forwarded HTTP headers. This can lead to URL redirection to untrusted sites. Fixed versions 4.0.8 and 4.1.3 address this issue.

References

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