CVE-2026-10721

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 96% 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
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.4Exploit: None knownExposed: 0

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

Concrete CMS below 9.5.2 is vulnerable to PHP Object Injection via unserialize() calls in the  in Permission, Cache, and Search components. An unauthenticated attacker may trigger arbitrary PHP object instantiation if a malicious serialized payload has been placed in the database. Thanks XananasX7 for reporting.

CVSS v3
8.4
EG Score
8.4(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity84% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

June 10, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Jun 10, 2026
No patch confirmed yet.
generic

9.5.2 Release Notes :: Concrete CMS

https://documentation.concretecms.org/9-x/developers/introduction/version-history/952-release-notes

Vendor Advisories for CVE-2026-10721(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)
Packagist(1)
PackageVulnerable rangeFixed inDependents
concrete5/concrete58.0 ... 9.5.1 (90 versions)9.5.2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 76× 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 208 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-10721?
CVE-2026-10721 is a high vulnerability published on June 10, 2026. Concrete CMS below 9.5.2 is vulnerable to PHP Object Injection via unserialize() calls in the in Permission, Cache, and Search components. An unauthenticated attacker may trigger arbitrary PHP object instantiation if a malicious serialized payload has been placed in the database. Thanks XananasX7…
When was CVE-2026-10721 disclosed?
CVE-2026-10721 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-10721 actively exploited?
CVE-2026-10721 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 96.4% of all scored CVEs.
What is the CVSS score of CVE-2026-10721?
CVE-2026-10721 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-10721?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-10721, 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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