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VulnerabilityPublished Updated

CVE-2026-40984: Spring Micrometer · Uncontrolled Resource Consumption

Affects Spring MicrometerSource CVE Database V5

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Not known to be exploited · CVSS 7.5 High · fixed in 1.16.5.1 : patch Spring Micrometer soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 56% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.16.5.1, 1.15.11.1, 1.14.16 +5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
SpringMicrometerAffected
  • >=1.16.0 <1.16.5.1
Fixed in
  • 1.16.5.1
SpringMicrometerAffected
  • >=1.15.0 <1.15.11.1
Fixed in
  • 1.15.11.1
SpringMicrometerAffected
  • >=1.14.0 <1.14.16
Fixed in
  • 1.14.16
SpringMicrometerAffected
  • >=1.13.0 <1.13.19
Fixed in
  • 1.13.19
SpringMicrometerAffected
  • >=1.9.0 <1.9.18
Fixed in
  • 1.9.18
SpringMicrometerAffected
  • >=1.16.0 <1.16.5.1
Fixed in
  • 1.16.5.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat's advisory does not indicate that a fix is currently available or that the issue is mitigated. Users should monitor Red Hat's security updates and apply patches once released. In the meantime, consider disabling or limiting HTTP server instrumentation metrics if feasible to reduce exposure.

Description

In Micrometer, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition. Affected versions: micrometer-core 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18; 1.9.0 through 1.9.17. micrometer-jetty11 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18. micrometer-jetty12 1.16.0 through 1.16.5; 1.15.0 through 1.15.11; 1.14.0 through 1.14.15; 1.13.0 through 1.13.18.

References

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