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Fencer Intel
medium —

CVE-2026-111259 json

Apache TomEE: Predictable HTTP session identifiers in embedded server

published yesterday modified yesterday also EUVD-2026-121222

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 10%
public exploits
0
none known

Summary

The embedded server generates HTTP session identifiers with a non-cryptographic random number generator by default. A remote attacker who observes a session identifier can predict the identifiers issued to other users and hijack their sessions, if the application relies on HTTP sessions for authentication. 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:tomee-embedded 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

0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-11).

Affected packages

ecosystem package affected fixed in
maven org.apache.tomee:tomee-embedded
>=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-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

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.