CVE-2025-53114

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 70% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

CometD is a scalable comet implementation for web messaging. In versions 5.0.0 through 5.0.22, 6.0.0 through 6.0.18, 7.0.0 through 7.0.18, and 8.0.0 through 8.0.8, bad clients that always send a fixed batch value when the server is using the acknowledgement extension may cause the unacknowledged message queue to grow indefinitely, eventually causing an OutOfMemoryError. Versions 5.0.23, 6.0.19, 7.0.19, and 8.0.9 patch the issue. As a workaround, disable the acknowledgement extension.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
30.4%
KEV
Not listed

Published

June 10, 2026

Last Modified

June 23, 2026

Advisory Details (6)

Auto-updated Jun 18, 2026
Patch available. Sources: github_pr, github.
github Patch Available

Acknowledgement extension out of memory · Advisory · cometd/cometd · GitHub

https://github.com/cometd/cometd/security/advisories/GHSA-cqgj-h8vf-4w59
github_pr

Backported improvements from #2117.

Fix merged in cometd/cometd PR #2169 on 2025-08-19 — awaiting tagged release

https://github.com/cometd/cometd/pull/2169
github_pr

Backported improvements from #2117.

Fix merged in cometd/cometd PR #2168 on 2025-08-19 — awaiting tagged release

https://github.com/cometd/cometd/pull/2168
github_pr Patch Available

Fixes #2117 - Improve ack extension.

Patch available: cometd/cometd 8.0.9 (PR #2118 merged 2025-07-08)

https://github.com/cometd/cometd/pull/2118
generic

Improve ack extension · Issue #2117 · cometd/cometd · GitHub

https://github.com/cometd/cometd/issues/2117
generic

Heap memory usage of `org.cometd.server.ServerSessionImpl` objects · cometd cometd · Discussion #2116 · GitHub

https://github.com/cometd/cometd/discussions/2116

Vendor Advisories for CVE-2025-53114(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.cometd.java:cometd-java-server-common8.0.0 ... 8.0.8 (9 versions)8.0.9—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 68× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-07 06:12 UTCEG score recompute
  2. 2026-07-06 16:27 UTCEPSS rescore
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  1. 2026-06-28 09:53 UTCEG score recompute
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  7. 2026-06-26 18:21 UTCEG score recompute
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  10. 2026-06-25 13:49 UTCEPSS rescore
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  23. 2026-06-20 01:37 UTCEG score recompute
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  37. 2026-06-13 11:08 UTCEG score recompute
  38. 2026-06-12 23:12 UTCEPSS rescore
  39. 2026-06-12 21:57 UTCEG score recompute
  40. 2026-06-12 08:46 UTCEG score recompute
  41. 2026-06-11 19:37 UTCEG score recompute
  42. 2026-06-11 06:27 UTCEG score recompute
  43. 2026-06-10 17:17 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-53114?
CVE-2025-53114 is a high vulnerability published on June 10, 2026. CometD is a scalable comet implementation for web messaging. In versions 5.0.0 through 5.0.22, 6.0.0 through 6.0.18, 7.0.0 through 7.0.18, and 8.0.0 through 8.0.8, bad clients that always send a fixed batch value when the server is using the acknowledgement extension may cause the unacknowledged…
When was CVE-2025-53114 disclosed?
CVE-2025-53114 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-53114 actively exploited?
CVE-2025-53114 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-53114?
CVE-2025-53114 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2025-53114?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-53114, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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