The max_age authentication-freshness check in OidcClientCodeRequestFilter was inoperative due…
CVE-2026-71575 is a critical-severity vulnerability in Apache CXF from Apache, with a CVSS 3.1 base score of 9.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 4.2.4, 4.1.9, 3.6.13 as the first without the flaw, so updating Apache CXF to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.36% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Apache CXF to 4.2.4 or 4.1.9 or 3.6.13, whichever matches your release line, or a later version.
- Update Cxf to 3.6.13 or 4.1.9 or 4.2.4, whichever matches your release line, or a later version.
- Read the advisory on lists.apache.org for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Apache | Apache CXF | 4.2.0 up to, but not including, 4.2.4; 4.0.0 up to, but not including, 4.1.9; before 3.6.13 | 4.2.4, 4.1.9, 3.6.13 |
| Apache | Cxf | before 3.6.13; 4.0.0 up to, but not including, 4.1.9; 4.2.0 up to, but not including, 4.2.4 | 3.6.13, 4.1.9, 4.2.4 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by CISA (ADP).
Official description
The max_age authentication-freshness check in OidcClientCodeRequestFilter was inoperative due to a milliseconds/seconds unit mismatch and an inverted comparison polarity. Any relying party using setMaxAgeOffset to enforce re-authentication would silently accept sessions of any age, bypassing step-up authentication policies. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
- lists.apache.org/thread/p1r9t4xl8ny7rg8wmj8nrygx35ds6vcsIssue Tracking, Mailing List
Third-party and government advisories
- openwall.com/lists/oss-security/2026/10/09/4Mailing List, Third Party Advisory
Other vulnerabilities in Apache CXF
- 7.5 High severity
- 9.1 Critical severity
- 7.5 High severity
- 7.5 High severity
- 8.1 High severity
- 7.5 High severity
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