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CVE-2026-61387

Medium6.9

In Eclipse Milo versions 1.0.0 through 1.1.4, monitored-item quota accounting is not exception-safe: if item creation fails with an unchecked error, the server-global reservation is not restored. Deeply nested PubSub ExtensionObjects in a `CreateMonitoredItems` event filter can trigger a `StackOverflowError` during decoding, allowing an unauthenticated remote client to exhaust a finite global monitored-item quota and prevent all clients from creating new monitored items until restart. Existing monitored items and other server functions remain unaffected.

CVSS
6.9v4.0
EPSS (exploit probability)
0.6%49th pct
CISA KEV
Not listed

EPSS trendFIRST daily scores, last 90 days

FIRST EPSS rose from 0.3% on 2026-09-18 to 0.6% on 2026-10-20, ranging 0.3%–0.6% across 31 daily scores.
2026-09-18 → 2026-10-20 · 31 days · 0.3%–0.6%
Daily values
FIRST EPSS daily scores for this CVE
Score dateEPSSPercentile
2026-10-200.6%48.8%
2026-10-190.6%48.7%
2026-10-180.6%48.6%
2026-10-160.6%48.6%
2026-10-150.6%48.6%
2026-10-140.6%48.5%
2026-10-130.6%48.3%
2026-10-120.6%48.2%
2026-10-110.6%48.2%
2026-10-100.6%48.2%
2026-10-090.6%48.1%
2026-10-080.6%48.1%
2026-10-070.6%48.1%
2026-10-060.6%48.0%
2026-10-050.6%47.9%
2026-10-040.6%47.9%
2026-10-030.6%47.9%
2026-10-020.6%47.8%
2026-10-010.6%47.8%
2026-09-300.6%47.7%
2026-09-290.6%47.6%
2026-09-270.6%47.6%
2026-09-260.6%47.6%
2026-09-250.6%47.5%
2026-09-240.6%47.4%
2026-09-230.3%28.1%
2026-09-220.3%28.1%
2026-09-210.3%28.0%
2026-09-200.3%28.1%
2026-09-190.3%28.1%
2026-09-180.3%28.1%

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • eclipse milo

Coverage1 article

References

Facts sourced from NVD, FIRST EPSS, and CISA KEV. Last synced 2026-10-21 08:34 UTC.

  • CVSS & description: NVD 2.0, fetched 2026-10-21 05:34 UTC
  • EPSS: FIRST EPSS, fetched 2026-10-21 08:34 UTC; score date 2026-10-20
  • KEV: CISA KEV, fetched 2026-10-21 08:34 UTC