CVE-2026-55808

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 5.4 from GitHub Security Advisory published 2026-07-11. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
5.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Drupal core allows Cross-Site Scripting (XSS). This issue affects Drupal core versions: from 0.0.0 to 10.5.12, from 10.6.0 to 10.6.11, from 11.2.0 to 11.2.14, from 11.3.0 to 11.3.12, from 0.0.0 to 11.0.*, from 0.0.0 to 11.1.*.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

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 (value × EchelonGraph’s weight)
Severity54% × 45%
The EG Score, 5.4 of 10.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
18th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 10, 2026

Last Modified

July 16, 2026

Advisory Details (1)

Auto-updated Jul 13, 2026
Patch available.
Web page

Drupal core - Moderately critical - Improper validation - SA-CORE-2026-009 | Drupal.org

https://www.drupal.org/sa-core-2026-009

Vendor Advisories for CVE-2026-55808(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 rangeFix by version rangeDependents
drupal/core10.0.0 ... 9.5.9 (477 versions)
  • every version up to 10.5.12: fixed in 10.5.12
  • 10.6.0 up to 10.6.11: fixed in 10.6.11
  • 11.2.0 up to 11.2.14: fixed in 11.2.14
  • 11.3.0 up to 11.3.12: fixed in 11.3.12
  • 11.0.0 up to 11.1.0: fixed in 11.1.0
  • 11.1.0 up to 11.2.0: fixed in 11.2.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 191 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 91 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  3. 2026-10-12 15:55 UTCEG score recompute
  4. 2026-10-11 19:38 UTCEG score recompute
  5. 2026-10-11 16:53 UTCEG score recompute
  6. 2026-10-11 14:16 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  16. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  18. 2026-10-01 14:55 UTCEG score recompute
  19. 2026-10-01 14:55 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  21. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  23. 2026-09-28 09:44 UTCEG score recompute
  24. 2026-09-28 09:44 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 17th percentile
Show 75 more
  1. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  2. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  3. 2026-09-24 11:07 UTCEG score recompute
  4. 2026-09-24 11:07 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  5. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  6. 2026-09-23 05:42 UTCEG score recompute
  7. 2026-09-23 05:42 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  8. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  9. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  10. 2026-09-18 05:15 UTCEG score recompute
  11. 2026-09-18 05:15 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  12. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  13. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  14. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  15. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  16. 2026-09-14 05:52 UTCEG score recompute
  17. 2026-09-14 05:52 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  18. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  19. 2026-09-13 08:09 UTCEG score recompute
  20. 2026-09-13 08:09 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  21. 2026-09-12 02:24 UTCEG score recompute
  22. 2026-09-12 02:24 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  23. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  24. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  25. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  26. 2026-09-08 02:36 UTCEG score recompute
  27. 2026-09-08 02:36 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  28. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  29. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  30. 2026-09-05 21:38 UTCEG score recompute
  31. 2026-09-05 21:38 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  32. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  33. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  34. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  35. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  36. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  37. 2026-08-30 05:59 UTCEG score recompute
  38. 2026-08-30 05:59 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  39. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  40. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  41. 2026-08-27 21:39 UTCEG score recompute
  42. 2026-08-27 21:39 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  43. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  44. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  45. 2026-08-26 12:53 UTCEG score recompute
  46. 2026-08-26 12:53 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  47. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  48. 2026-08-25 11:59 UTCEG score recompute
  49. 2026-08-25 11:59 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  50. 2026-08-24 14:14 UTCEG score recompute
  51. 2026-08-24 14:14 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  52. 2026-08-23 16:30 UTCEG score recompute
  53. 2026-08-23 16:30 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  54. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  55. 2026-08-22 18:46 UTCEG score recompute
  56. 2026-08-22 18:46 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  57. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  58. 2026-08-21 20:58 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  59. 2026-08-20 23:13 UTCEG score recompute
  60. 2026-08-20 23:13 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  61. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  62. 2026-08-20 01:29 UTCEG score recompute
  63. 2026-08-20 01:29 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  64. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  65. 2026-08-19 01:32 UTCEG score recompute
  66. 2026-08-19 01:32 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  67. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  68. 2026-08-18 03:48 UTCEG score recompute
  69. 2026-08-18 03:48 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  70. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  71. 2026-08-17 06:04 UTCEG score recompute
  72. 2026-08-17 06:04 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4
  73. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  74. 2026-08-16 08:19 UTCEG score recompute
  75. 2026-08-16 08:19 UTCGHSA enrichmentGHSA-9wh5-5mcm-hf2j · GitHub CVSS 5.4

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Frequently asked(5)

What is CVE-2026-55808?
CVE-2026-55808 is a medium-severity vulnerability; its CVE record was published on July 10, 2026. Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Drupal core allows Cross-Site Scripting (XSS). This issue affects Drupal core versions: from 0.0.0 to 10.5.12, from 10.6.0 to 10.6.11, from 11.2.0 to 11.2.14, from 11.3.0 to 11.3.12, from…
When was CVE-2026-55808 made public?
CVE-2026-55808 was made public on June 17, 2026: that is the date its CVE record's CNA, Drupal.org, gives for when the vulnerability was made public. The CVE record itself was published on July 10, 2026. EchelonGraph's copy of the record carries a last-modified date of July 16, 2026; the record at its source may have been updated since.
Is CVE-2026-55808 actively exploited?
CVE-2026-55808 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55808?
CVE-2026-55808 has a CVSS v3.1 base score of 5.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-55808?
A fix for CVE-2026-55808 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55808 are linked in the Vendor Advisories panel on this page.

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