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Fencer Intel
medium —

CVE-2026-87755 json

Apache TomEE: Stateful session bean hijacking via predictable session identifiers

published yesterday modified yesterday also EUVD-2026-121215

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 8%
public exploits
0
none known

Summary

Stateful session bean identifiers are not generated from a cryptographically secure random source. A remote attacker with access to the EJB remote endpoint who holds one valid identifier can derive those of other clients' sessions and invoke methods on their beans, exposing or modifying other users' session state. Users are recommended to upgrade to version 10.3.0 or 11.0.0-M2, which fix the issue.

Patch / fix

  • maven org.apache.tomee:openejb-core 10.0.0-M1, 10.3.0, 11.0.0-M2
  • Apache Software Foundation Apache TomEE 10.0.0-M1, 10.3.0, 11.0.0-M2

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Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-11).

Affected packages

ecosystem package affected fixed in
maven org.apache.openejb:openejb-core
>=4.0.0-beta-1, <=4.7.5
 no fix listed
maven org.apache.tomee:openejb-core
>=7.0.0-M1, <10.0.0-M1
>=10.0.0-M1, <10.3.0
>=11.0.0-M1, <11.0.0-M2
10.0.0-M1
10.3.0
11.0.0-M2

Affected products

  • Apache Software Foundation Apache TomEE

Classification

Weakness
  • CWE-340 Generation of Predictable Numbers or Identifiers

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.