CVE-2026-73631

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-08-15. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

Exposure of data element to wrong session vulnerability in the JSON plugin of Apache Struts. Per-request parsing state could be shared across concurrent requests, allowing data associated with one request to become observable in another, and configured parsing limits not to be enforced as intended. Populating actions from a JSON request body is not enabled by default; applications that do not use the JSON plugin are not affected.

This issue affects Apache Struts: 7.2.1.

Users are recommended to upgrade to version 7.3.0, which fixes the issue.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 18, 2026

Advisory Details (1)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

S2-070 - Apache Struts 2 Wiki - Apache Software Foundation

https://cwiki.apache.org/confluence/display/WW/S2-070

Vendor Advisories for CVE-2026-73631(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 19× in last 7d / 82× 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 102 total refreshes for this CVE.

  1. 2026-09-18 21:58 UTCEG score recompute
  2. 2026-09-18 21:58 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-17 22:19 UTCEG score recompute
  5. 2026-09-17 22:19 UTCGHSA enrichment
  6. 2026-09-16 23:28 UTCEG score recompute
  7. 2026-09-16 23:28 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-15 21:43 UTCEG score recompute
  11. 2026-09-15 21:43 UTCGHSA enrichment
  12. 2026-09-15 03:12 UTCEPSS rescore
  13. 2026-09-14 21:38 UTCEG score recompute
  14. 2026-09-14 21:38 UTCGHSA enrichment
  15. 2026-09-13 22:11 UTCEG score recompute
  16. 2026-09-13 22:11 UTCGHSA enrichment
  17. 2026-09-12 23:20 UTCEG score recompute
  18. 2026-09-12 23:20 UTCGHSA enrichment
  19. 2026-09-12 15:02 UTCEPSS rescore
  20. 2026-09-12 00:29 UTCEG score recompute
  21. 2026-09-12 00:29 UTCGHSA enrichment
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-11 01:38 UTCEG score recompute
  24. 2026-09-11 01:38 UTCGHSA enrichment
  25. 2026-09-10 09:35 UTCEPSS rescore
Show 75 more
  1. 2026-09-10 02:47 UTCGHSA enrichment
  2. 2026-09-09 03:55 UTCEG score recompute
  3. 2026-09-09 03:54 UTCGHSA enrichment
  4. 2026-09-08 22:01 UTCEPSS rescore
  5. 2026-09-07 21:02 UTCEG score recompute
  6. 2026-09-07 21:02 UTCGHSA enrichment
  7. 2026-09-06 22:12 UTCEG score recompute
  8. 2026-09-06 22:12 UTCGHSA enrichment
  9. 2026-09-06 13:48 UTCEPSS rescore
  10. 2026-09-05 23:20 UTCEG score recompute
  11. 2026-09-05 23:20 UTCGHSA enrichment
  12. 2026-09-05 00:29 UTCEG score recompute
  13. 2026-09-05 00:28 UTCGHSA enrichment
  14. 2026-09-04 05:07 UTCEPSS rescore
  15. 2026-09-04 01:37 UTCGHSA enrichment
  16. 2026-09-03 02:46 UTCEG score recompute
  17. 2026-09-03 02:46 UTCGHSA enrichment
  18. 2026-09-02 14:12 UTCEPSS rescore
  19. 2026-09-02 03:47 UTCEG score recompute
  20. 2026-09-02 03:47 UTCGHSA enrichment
  21. 2026-09-01 13:54 UTCEPSS rescore
  22. 2026-09-01 04:40 UTCEPSS rescore
  23. 2026-09-01 04:40 UTCEPSS rescore
  24. 2026-09-01 04:23 UTCGHSA enrichment
  25. 2026-08-31 04:50 UTCEG score recompute
  26. 2026-08-31 04:50 UTCGHSA enrichment
  27. 2026-08-30 19:18 UTCEPSS rescore
  28. 2026-08-30 19:17 UTCEPSS rescore
  29. 2026-08-30 06:00 UTCEG score recompute
  30. 2026-08-30 06:00 UTCGHSA enrichment
  31. 2026-08-30 01:22 UTCEPSS rescore
  32. 2026-08-29 07:09 UTCEG score recompute
  33. 2026-08-29 07:09 UTCGHSA enrichment
  34. 2026-08-28 21:42 UTCEPSS rescore
  35. 2026-08-28 08:13 UTCEG score recompute
  36. 2026-08-28 08:12 UTCGHSA enrichment
  37. 2026-08-27 14:25 UTCEPSS rescore
  38. 2026-08-27 09:18 UTCEG score recompute
  39. 2026-08-27 09:18 UTCGHSA enrichment
  40. 2026-08-26 14:47 UTCEPSS rescore
  41. 2026-08-26 10:26 UTCEG score recompute
  42. 2026-08-26 10:26 UTCGHSA enrichment
  43. 2026-08-25 13:49 UTCEPSS rescore
  44. 2026-08-25 11:35 UTCEG score recompute
  45. 2026-08-25 11:35 UTCGHSA enrichment
  46. 2026-08-24 12:44 UTCEG score recompute
  47. 2026-08-24 12:44 UTCGHSA enrichment
  48. 2026-08-23 13:53 UTCEG score recompute
  49. 2026-08-23 13:53 UTCGHSA enrichment
  50. 2026-08-23 00:19 UTCEPSS rescore
  51. 2026-08-22 15:02 UTCEG score recompute
  52. 2026-08-22 15:02 UTCGHSA enrichment
  53. 2026-08-21 23:49 UTCEPSS rescore
  54. 2026-08-21 16:11 UTCEG score recompute
  55. 2026-08-21 16:11 UTCGHSA enrichment
  56. 2026-08-20 22:56 UTCEPSS rescore
  57. 2026-08-20 17:14 UTCGHSA enrichment
  58. 2026-08-19 18:22 UTCEG score recompute
  59. 2026-08-19 18:22 UTCGHSA enrichment
  60. 2026-08-19 17:04 UTCEPSS rescore
  61. 2026-08-18 18:04 UTCGHSA enrichment
  62. 2026-08-18 15:18 UTCEG score recompute
  63. 2026-08-18 15:18 UTCGHSA enrichment
  64. 2026-08-18 13:49 UTCEPSS rescore
  65. 2026-08-18 13:49 UTCEPSS rescore
  66. 2026-08-18 12:25 UTCEG score recompute
  67. 2026-08-18 12:24 UTCGHSA enrichment
  68. 2026-08-17 13:47 UTCEPSS rescore
  69. 2026-08-17 13:30 UTCGHSA enrichment
  70. 2026-08-17 12:56 UTCEG score recompute▲ 4.30
  71. 2026-08-17 12:56 UTCGHSA enrichment
  72. 2026-08-17 12:56 UTCMITRE cvelistV5CVSS v3 → 4.3 · severity → MEDIUM
  73. 2026-08-16 14:56 UTCEPSS rescore
  74. 2026-08-16 14:56 UTCEPSS rescore
  75. 2026-08-15 11:25 UTCNVD update

Frequently asked(5)

What is CVE-2026-73631?
CVE-2026-73631 is a medium vulnerability published on August 15, 2026. Exposure of data element to wrong session vulnerability in the JSON plugin of Apache Struts. Per-request parsing state could be shared across concurrent requests, allowing data associated with one request to become observable in another, and configured parsing limits not to be enforced as intended.…
When was CVE-2026-73631 disclosed?
CVE-2026-73631 was first published in the National Vulnerability Database on August 15, 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-2026-73631 actively exploited?
CVE-2026-73631 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 81.7% of all scored CVEs.
What is the CVSS score of CVE-2026-73631?
CVE-2026-73631 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-73631?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73631, 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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