CVE-2026-53917

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-30. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

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

Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker.

An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker. This issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Broker: before 5.19.8, from 6.0.0 before 6.2.7.

Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
52.0%
KEV
Not listed

Published

June 30, 2026

Last Modified

July 2, 2026

Advisory Details (2)

Auto-updated Jun 30, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-53917: Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker: Unbounded memory allocation in OpenWire property unmarshalling

http://www.openwall.com/lists/oss-security/2026/06/29/14
generic
https://lists.apache.org/thread/grrd1mwgkgblqjbwkkq6dvmdxd9ov2dx

Vendor Advisories for CVE-2026-53917(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 29× in last 7d / 29× 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 02:28 UTCEG score recompute
  2. 2026-07-07 02:28 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 15:00 UTCEG score recompute
  6. 2026-07-06 14:59 UTCGHSA enrichment
  7. 2026-07-06 03:30 UTCEG score recompute
  8. 2026-07-06 03:30 UTCGHSA enrichment
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-05 16:00 UTCEG score recompute
  12. 2026-07-05 16:00 UTCGHSA enrichment
  13. 2026-07-05 04:34 UTCEG score recompute
  14. 2026-07-05 04:34 UTCGHSA enrichment
  15. 2026-07-05 02:31 UTCEPSS rescore
  16. 2026-07-05 02:30 UTCEPSS rescore
  17. 2026-07-04 17:07 UTCEG score recompute
  18. 2026-07-04 17:07 UTCGHSA enrichment
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-04 05:37 UTCEG score recompute
  22. 2026-07-04 05:36 UTCGHSA enrichment
  23. 2026-07-03 18:09 UTCEG score recompute▲ 7.50
  24. 2026-07-03 18:09 UTCGHSA enrichment
  25. 2026-07-01 15:07 UTCEPSS rescore
Show 4 more
  1. 2026-06-30 16:32 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  2. 2026-06-30 12:32 UTCEG score recompute
  3. 2026-06-30 12:32 UTCGHSA enrichment
  4. 2026-06-30 12:32 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-53917?
CVE-2026-53917 is a high vulnerability published on June 30, 2026. Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker. An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message…
When was CVE-2026-53917 disclosed?
CVE-2026-53917 was first published in the National Vulnerability Database on June 30, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53917 actively exploited?
CVE-2026-53917 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 52.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53917?
CVE-2026-53917 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-53917?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53917, 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.

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