CVE-2026-15803

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 72% 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
Trending — 3 sources updated this week
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: None knownExposed: 0

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

In Eclipse RDF4J, several XML parser entry points do not fully restrict XML External Entity (XXE) processing when parsing untrusted XML-based RDF data or query results, permitting DOCTYPE declarations, external entity references, and external DTD loading. This is due to an incomplete fix for CVE-2018-1000644: the earlier fix did not cover all parser entry points. The issue is resolved in RDF4J 5.3.2, which rejects or disables DOCTYPE declarations, external entities, and external DTD loading by default.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: Track

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
Severity87% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 18, 2026

Advisory Details (2)

Auto-updated Aug 12, 2026
No patch confirmed yet.
generic

request CVE for XXE in RDF4J before version 5.3.2 (#175) · Issues · Eclipse Projects Security / cve-assignment · GitLab

https://gitlab.eclipse.org/security/cve-assignment/-/work_items/175
generic

5.3.2 · Eclipse RDF4J™ | The Eclipse Foundation

https://rdf4j.org/release-notes/5.3.2/

Vendor Advisories for CVE-2026-15803(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 104× 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 141 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15803?
CVE-2026-15803 is a high vulnerability published on August 12, 2026. In Eclipse RDF4J, several XML parser entry points do not fully restrict XML External Entity (XXE) processing when parsing untrusted XML-based RDF data or query results, permitting DOCTYPE declarations, external entity references, and external DTD loading. This is due to an incomplete fix for…
When was CVE-2026-15803 disclosed?
CVE-2026-15803 was first published in the National Vulnerability Database on August 12, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15803 actively exploited?
CVE-2026-15803 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 72.0% of all scored CVEs.
What is the CVSS score of CVE-2026-15803?
CVE-2026-15803 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-15803?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15803, 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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