CVE-2026-53917

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM 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
7.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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

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
7.5HIGHmedium confidence
EG Risk
39
EG Risk 39/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation1% × 40%
Automatability30% × 15%
EPSS PROB
0.7%
EPSS %ILE
53rd
KEV
Not listed

Published

June 30, 2026

Last Modified

July 2, 2026

Advisory Details (2)

Auto-updated Jun 30, 2026
No fix on record 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.

Affected Packages

(3 across 3 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
activemq5.16.1-1 ... 5.17.6+dfsg-2 (8 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
activemq5.17.2+dfsg-2, 5.17.2+dfsg-2+deb12u1, 5.17.6+dfsg-1, 5.17.6+dfsg-2
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
activemq5.17.6+dfsg-2
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 32× 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.

Showing the most recent 100 of 237 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:12 UTCEPSS rescore
  3. 2026-10-07 23:48 UTCEPSS rescore
  4. 2026-10-06 15:18 UTCEPSS rescore
  5. 2026-10-05 17:43 UTCEPSS rescore
  6. 2026-10-04 23:22 UTCEPSS rescore
  7. 2026-10-03 14:26 UTCEPSS rescore
  8. 2026-10-02 17:56 UTCEPSS rescore
  9. 2026-10-01 19:50 UTCEPSS rescore
  10. 2026-09-30 15:03 UTCEPSS rescore
  11. 2026-09-29 15:22 UTCEPSS rescore
  12. 2026-09-28 13:51 UTCEPSS rescore
  13. 2026-09-27 13:48 UTCEPSS rescore
  14. 2026-09-26 15:59 UTCEPSS rescore
  15. 2026-09-24 14:04 UTCEPSS rescore
  16. 2026-09-23 17:54 UTCEPSS rescore
  17. 2026-09-23 07:24 UTCEG score recompute
  18. 2026-09-23 07:24 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 06:52 UTCEG score recompute
  22. 2026-09-18 06:52 UTCGHSA enrichment
  23. 2026-09-17 19:31 UTCEPSS rescore
  24. 2026-09-16 14:08 UTCEPSS rescore
  25. 2026-09-16 05:15 UTCEPSS rescore
Show 75 more
  1. 2026-09-14 00:49 UTCEG score recompute
  2. 2026-09-14 00:49 UTCGHSA enrichment
  3. 2026-09-13 16:47 UTCEPSS rescore
  4. 2026-09-13 09:17 UTCGHSA enrichment
  5. 2026-09-12 15:11 UTCEG score recompute
  6. 2026-09-12 15:11 UTCGHSA enrichment
  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-10 09:35 UTCEPSS rescore
  9. 2026-09-08 22:01 UTCEPSS rescore
  10. 2026-09-07 16:01 UTCEPSS rescore
  11. 2026-09-06 14:37 UTCEG score recompute
  12. 2026-09-06 14:37 UTCGHSA enrichment
  13. 2026-09-06 13:47 UTCEPSS rescore
  14. 2026-09-04 05:06 UTCEPSS rescore
  15. 2026-09-02 14:12 UTCEPSS rescore
  16. 2026-09-01 13:54 UTCEPSS rescore
  17. 2026-09-01 04:40 UTCEPSS rescore
  18. 2026-08-30 19:17 UTCEPSS rescore
  19. 2026-08-30 18:14 UTCEG score recompute
  20. 2026-08-30 18:14 UTCGHSA enrichment
  21. 2026-08-30 01:22 UTCEPSS rescore
  22. 2026-08-28 21:41 UTCEPSS rescore
  23. 2026-08-27 22:44 UTCEG score recompute
  24. 2026-08-27 22:44 UTCGHSA enrichment
  25. 2026-08-27 14:25 UTCEPSS rescore
  26. 2026-08-26 14:46 UTCEPSS rescore
  27. 2026-08-25 13:49 UTCEPSS rescore
  28. 2026-08-24 23:14 UTCEG score recompute
  29. 2026-08-24 23:14 UTCGHSA enrichment
  30. 2026-08-24 11:47 UTCEG score recompute
  31. 2026-08-24 11:47 UTCGHSA enrichment
  32. 2026-08-23 19:53 UTCGHSA enrichment
  33. 2026-08-23 08:27 UTCEG score recompute
  34. 2026-08-23 08:27 UTCGHSA enrichment
  35. 2026-08-23 00:19 UTCEPSS rescore
  36. 2026-08-22 20:41 UTCGHSA enrichment
  37. 2026-08-22 08:30 UTCEG score recompute
  38. 2026-08-22 08:30 UTCGHSA enrichment
  39. 2026-08-21 23:49 UTCEPSS rescore
  40. 2026-08-21 17:20 UTCGHSA enrichment
  41. 2026-08-21 04:51 UTCEG score recompute
  42. 2026-08-21 04:51 UTCGHSA enrichment
  43. 2026-08-20 22:55 UTCEPSS rescore
  44. 2026-08-20 17:05 UTCGHSA enrichment
  45. 2026-08-20 05:38 UTCEG score recompute
  46. 2026-08-20 05:38 UTCGHSA enrichment
  47. 2026-08-19 17:04 UTCEPSS rescore
  48. 2026-08-19 10:32 UTCGHSA enrichment
  49. 2026-08-18 23:05 UTCEG score recompute
  50. 2026-08-18 23:05 UTCGHSA enrichment
  51. 2026-08-18 13:48 UTCEPSS rescore
  52. 2026-08-18 06:23 UTCEG score recompute
  53. 2026-08-18 06:23 UTCGHSA enrichment
  54. 2026-08-17 13:47 UTCEPSS rescore
  55. 2026-08-17 06:09 UTCGHSA enrichment
  56. 2026-08-16 18:35 UTCEG score recompute
  57. 2026-08-16 18:35 UTCGHSA enrichment
  58. 2026-08-16 14:56 UTCEPSS rescore
  59. 2026-08-16 07:08 UTCEG score recompute
  60. 2026-08-16 07:08 UTCGHSA enrichment
  61. 2026-08-16 02:14 UTCEPSS rescore
  62. 2026-08-15 19:43 UTCGHSA enrichment
  63. 2026-08-15 08:17 UTCEG score recompute
  64. 2026-08-15 08:17 UTCGHSA enrichment
  65. 2026-08-15 01:30 UTCEPSS rescore
  66. 2026-08-14 20:50 UTCGHSA enrichment
  67. 2026-08-14 09:24 UTCEG score recompute
  68. 2026-08-14 09:24 UTCGHSA enrichment
  69. 2026-08-13 22:00 UTCEPSS rescore
  70. 2026-08-13 21:58 UTCGHSA enrichment
  71. 2026-08-13 10:32 UTCGHSA enrichment
  72. 2026-08-12 23:06 UTCEG score recompute
  73. 2026-08-12 23:06 UTCGHSA enrichment
  74. 2026-08-12 13:51 UTCEPSS rescore
  75. 2026-08-12 11:40 UTCGHSA enrichment

Related CVEs(same product + same CWE)

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 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 0.7% probability of exploitation in the next 30 days (53rd percentile of EPSS-scored CVEs).
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?
No fix for CVE-2026-53917 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-53917 are linked in the Vendor Advisories panel on this page.

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