CVE-2026-55809

CRITICALPre-NVD 8.19.8▲
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-11. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.1; sources differ by 1.7.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0

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

Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Flag attendance field allows Object Injection. This issue affects Flag attendance field versions: from 0.0.0 to 1.2.

CVSS v3
8.1
EG Score
9.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

July 10, 2026

Last Modified

July 14, 2026

Advisory Details (1)

Auto-updated Jul 13, 2026
No patch confirmed yet.
generic

Flag attendance field - Critical - PHP object injection - SA-CONTRIB-2026-049 | Drupal.org

https://www.drupal.org/sa-contrib-2026-049

Vendor Advisories for CVE-2026-55809(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:https://packages.drupal.org/8(1)
PackageVulnerable rangeFixed inDependents
drupal/flag_attendance_field—1.2.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 30× in last 7d / 195× 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 276 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-55809?
CVE-2026-55809 is a critical vulnerability published on July 10, 2026. Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Flag attendance field allows Object Injection. This issue affects Flag attendance field versions: from 0.0.0 to 1.2.
When was CVE-2026-55809 disclosed?
CVE-2026-55809 was first published in the National Vulnerability Database on July 10, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55809 actively exploited?
CVE-2026-55809 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 64.0% of all scored CVEs.
What is the CVSS score of CVE-2026-55809?
CVE-2026-55809 has a CVSS v3.1 base score of 8.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.
How do I remediate CVE-2026-55809?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55809, 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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