Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Apache CXF cxf-core, Maven org.apache.cxf:cxf-core, versions 4.2.0 to before 4.2.2, 4.0.0 to before 4.1.7, and before 3.6.12, has no limit on the number of attachment headers a message can carry when deserialized. An attacker who can send messages to the service can exhaust resources and cause a denial of service. Upgrade to 4.2.2, 4.1.7, or 3.6.12, which cap attachments at 500 per message by default.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0046, the 40th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 12 Jun 2026, 10:16 UTC Confirmed by NVD
- 31 Oct 2026, 14:17 UTC First seen by agentprime
- 31 Oct 2026, 14:17 UTC Confirmed by OSV