CVE-2026-81896

MEDIUMNVD 5.45.4
EchelonGraph scoreMEDIUM confidence

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

Score 5.4 from GitHub Security Advisory (severity: HIGH) published 2026-09-15. NVD baseline CVSS 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2026-78928 (ENISA EUVD) · GHSA-jhq2-9mcm-q56w (GitHub Security Advisories)Source: ENISA EUVD

5.4EG
EchelonGraph verdictMonitorNo fix is confirmed yet: check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.4Exploit: None knownExposed services: Not assessed

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

The CVE record's description, written by its CNA (Concrete CMS), states the affected versions: "Concrete CMS before 9.5.3 does not apply HTML entity encoding to user-defined Form block question labels when rendering them as column headers in the Dashboard Form Submissions report (concrete/single_pages/dashboard/re…" No release containing a fix is confirmed on record.

Concrete CMS before 9.5.3 does not apply HTML entity encoding to user-defined Form block question labels when rendering them as column headers in the Dashboard Form Submissions report (concrete/single_pages/dashboard/reports/forms/legacy.php). a rogue editor could store markup or script in a label that then executes in the browser of any administrator who opens the submissions report for the affected form, producing stored cross-site scripting in the Dashboard. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 8.4 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori from Tenzai for reporting.

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 impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity54% × 45%
Impact severity (EG Severity): CVSS 5.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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: No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
0.2%
EPSS %ILE
14th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.4): severity, escalated by confirmed exploitation. This CVE's 5.4 is its impact severity (EG Severity), not escalated.

EG Severity
5.4 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

September 15, 2026

Last Modified

September 22, 2026

Vendor Advisories for CVE-2026-81896(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 8× in last 7d / 53× 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 106 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 6 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  6. 2026-10-27 18:25 UTCOSV refresh
  7. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  8. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  9. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-10-25 13:58 UTCEG score recompute
  11. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  12. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  13. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  14. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  15. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  16. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  17. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  18. 2026-10-18 03:08 UTCEG score recompute
  19. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  20. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-10-15 18:38 UTCEG score recompute
  22. 2026-10-15 18:38 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  23. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  24. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
Show 75 more
  1. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-10-12 14:56 UTCEG score recompute
  3. 2026-10-11 19:20 UTCEG score recompute
  4. 2026-10-11 16:36 UTCEG score recompute
  5. 2026-10-11 13:54 UTCEG score recompute
  6. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  7. 2026-10-11 05:38 UTCEG score recompute
  8. 2026-10-11 05:38 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  10. 2026-10-10 02:06 UTCEG score recompute
  11. 2026-10-10 02:06 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  13. 2026-10-09 00:13 UTCEG score recompute
  14. 2026-10-09 00:13 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  15. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  16. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  17. 2026-10-07 22:21 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  18. 2026-10-06 20:24 UTCEG score recompute
  19. 2026-10-06 20:24 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-10-05 18:32 UTCEG score recompute
  22. 2026-10-05 18:32 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  23. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  24. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-10-04 16:40 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  26. 2026-10-03 14:47 UTCEG score recompute
  27. 2026-10-03 14:47 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  28. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  29. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  30. 2026-10-02 12:34 UTCEG score recompute
  31. 2026-10-02 12:34 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  32. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  33. 2026-10-01 10:42 UTCEG score recompute
  34. 2026-10-01 10:42 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  35. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  36. 2026-09-30 08:48 UTCEG score recompute
  37. 2026-09-30 08:48 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  38. 2026-09-29 06:56 UTCEG score recompute
  39. 2026-09-29 06:56 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  40. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  41. 2026-09-28 05:04 UTCEG score recompute
  42. 2026-09-28 05:04 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  43. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  44. 2026-09-27 03:12 UTCEG score recompute
  45. 2026-09-27 03:12 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  46. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  47. 2026-09-26 01:16 UTCEG score recompute
  48. 2026-09-26 01:16 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  49. 2026-09-24 23:18 UTCEG score recompute
  50. 2026-09-24 23:18 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  51. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  52. 2026-09-23 21:26 UTCEG score recompute
  53. 2026-09-23 21:26 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  54. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  55. 2026-09-22 19:34 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  56. 2026-09-22 18:34 UTCEG score recompute
  57. 2026-09-22 18:34 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  58. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  59. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  60. 2026-09-21 21:04 UTCEG score recompute
  61. 2026-09-21 21:04 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  62. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  63. 2026-09-20 19:11 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  64. 2026-09-19 17:19 UTCEG score recompute
  65. 2026-09-19 17:19 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH · GitHub CVSS 5.4
  66. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  67. 2026-09-18 15:27 UTCEG score recompute▼ 3.00
  68. 2026-09-18 15:27 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH
  69. 2026-09-18 15:23 UTCNVD updateCVSS v3 → 5.4 · severity → MEDIUM
  70. 2026-09-18 06:11 UTCEG score recompute
  71. 2026-09-18 06:11 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH
  72. 2026-09-17 19:21 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH
  73. 2026-09-17 06:14 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH
  74. 2026-09-16 19:23 UTCGHSA enrichmentGHSA-jhq2-9mcm-q56w · GitHub severity HIGH
  75. 2026-09-16 15:13 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-81896?
CVE-2026-81896 is a medium-severity vulnerability; its CVE record was published on September 15, 2026. Concrete CMS before 9.5.3 does not apply HTML entity encoding to user-defined Form block question labels when rendering them as column headers in the Dashboard Form Submissions report (concrete/single_pages/dashboard/reports/forms/legacy.php). a rogue editor could store markup or script in a label…
When was the CVE record for CVE-2026-81896 published?
The CVE record for CVE-2026-81896 was published on September 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 22, 2026; the record at its source may have been updated since.
Is CVE-2026-81896 actively exploited?
CVE-2026-81896 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-81896?
CVE-2026-81896 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-81896?
No fix for CVE-2026-81896 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The CVE record's description, written by its CNA (Concrete CMS), states the affected versions: "Concrete CMS before 9.5.3 does not apply HTML entity encoding to user-defined Form block question labels when rendering them as column headers in the Dashboard Form Submissions report (concrete/single_pages/dashboard/re…" No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-81896 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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