CVE-2026-54718

HIGHPre-NVD 7.27.2
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.0% (63rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
7.2EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.0%CVSS: 7.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Silverstripe Advanced Workflow is a highly configurable step-based workflow module. Prior to 6.4.5, 7.1.3, and 7.2.1, an attacker with permission to author the advanced workflow email template can place a specially crafted server-side template payload in NotifyUsersWorkflowAction.EmailTemplate. When NotifyUsersWorkflowAction renders the field through the Silverstripe template engine SSTemplateParser, the payload can cause PHP evaluation and arbitrary code execution on the server; the regression coverage is in tests/php/WorkflowEngineTest.php. This issue is fixed in versions 6.4.5, 7.1.3, and 7.2.1.

CVSS v3
7.2
EG Score
7.2HIGHmedium confidence
EG Risk
33
EG Risk 33/100

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)
Severity72% × 45%
The EG Score, 7.2 of 10.
Exploitation1.1% × 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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
1.0%
EPSS %ILE
63rd
KEV
Not listed

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

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

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.

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

August 27, 2026

Last Modified

September 9, 2026

Advisory Details (9)

Auto-updated Aug 27, 2026
Patch available. Sources: github_release, github, github_commit, github_pr.
Web page
https://www.silverstripe.org/download/security-releases/cve-2026-54718
GitHub advisoryMentions a patch (unverified)

Remote code execution via advanced workflow email template · Advisory · silverstripe/silverstripe-advancedworkflow · GitHub

https://github.com/silverstripe/silverstripe-advancedworkflow/security/advisories/GHSA-39mm-rwm3-29jp
GitHub release Patch Available

7.2.1

Patch available: silverstripe/silverstripe-advancedworkflow 7.2.1

https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.2.1
GitHub release Patch Available

7.1.3

Patch available: silverstripe/silverstripe-advancedworkflow 7.1.3

https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/7.1.3
GitHub release Patch Available

6.4.5

Patch available: silverstripe/silverstripe-advancedworkflow 6.4.5

https://github.com/silverstripe/silverstripe-advancedworkflow/releases/tag/6.4.5
GitHub pull request Patch Available

[CVE-2026-54718] Prevent RCE via notification email template

Patch available: silverstripe/silverstripe-advancedworkflow 6.4.5 (PR #630 merged 2026-06-24)

https://github.com/silverstripe/silverstripe-advancedworkflow/pull/630
GitHub pull request Patch Available

[CVE-2026-54718] Prevent RCE via notification email template

Patch available: silverstripe/silverstripe-advancedworkflow 7.1.3 (PR #629 merged 2026-06-24)

https://github.com/silverstripe/silverstripe-advancedworkflow/pull/629
GitHub commit Patch Available

commit f170766af992 (silverstripe/silverstripe-advancedworkflow)

Patch available: silverstripe/silverstripe-advancedworkflow 6.4.5 (contains commit f170766af992)

https://github.com/silverstripe/silverstripe-advancedworkflow/commit/f170766af992ed2ed3e5f21d127d0d0d3129678b
GitHub commit Patch Available

commit 28d0b536491e (silverstripe/silverstripe-advancedworkflow)

Patch available: silverstripe/silverstripe-advancedworkflow 7.1.3 (contains commit 28d0b536491e)

https://github.com/silverstripe/silverstripe-advancedworkflow/commit/28d0b536491e5c68b1c445579bdd1ddc8beaf8bb

Vendor Advisories for CVE-2026-54718(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
symbiote/silverstripe-advancedworkflow7.2.0
  • every version up to 6.4.5: fixed in 6.4.5
  • 7.0.0 up to 7.1.3: fixed in 7.1.3
  • 7.2.0 up to 7.2.1: fixed in 7.2.1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 56× 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.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  3. 2026-10-12 15:56 UTCEG score recompute
  4. 2026-10-11 19:39 UTCEG score recompute
  5. 2026-10-11 16:54 UTCEG score recompute
  6. 2026-10-11 14:17 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  9. 2026-10-10 01:52 UTCEG score recompute
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  11. 2026-10-09 03:02 UTCEG score recompute
  12. 2026-10-08 17:12 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  13. 2026-10-08 01:18 UTCEG score recompute
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  15. 2026-10-06 19:14 UTCEG score recompute
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  17. 2026-10-06 07:32 UTCEG score recompute
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  19. 2026-10-05 04:36 UTCEG score recompute
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  21. 2026-10-03 17:45 UTCEG score recompute
  22. 2026-10-03 14:26 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  23. 2026-10-02 18:52 UTCEG score recompute
  24. 2026-10-02 17:56 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  25. 2026-10-01 19:52 UTCEG score recompute
Show 64 more
  1. 2026-10-01 19:50 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  2. 2026-09-30 19:54 UTCEG score recompute
  3. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  4. 2026-09-29 15:30 UTCEG score recompute
  5. 2026-09-29 15:22 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  6. 2026-09-29 04:04 UTCEG score recompute
  7. 2026-09-28 16:29 UTCEG score recompute
  8. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  9. 2026-09-27 17:36 UTCEG score recompute
  10. 2026-09-27 13:48 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  11. 2026-09-26 18:41 UTCEG score recompute
  12. 2026-09-26 15:59 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  13. 2026-09-24 17:09 UTCEG score recompute
  14. 2026-09-24 14:04 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  15. 2026-09-23 18:15 UTCEG score recompute
  16. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  17. 2026-09-22 19:22 UTCEG score recompute
  18. 2026-09-22 07:54 UTCEG score recompute
  19. 2026-09-20 21:18 UTCEG score recompute
  20. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  21. 2026-09-19 22:25 UTCEG score recompute
  22. 2026-09-18 23:26 UTCEG score recompute
  23. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  24. 2026-09-18 00:32 UTCEG score recompute
  25. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  26. 2026-09-17 01:35 UTCEG score recompute
  27. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  28. 2026-09-16 14:08 UTCEG score recompute
  29. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  30. 2026-09-15 03:20 UTCEG score recompute
  31. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  32. 2026-09-13 16:59 UTCEG score recompute
  33. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  34. 2026-09-12 18:06 UTCEG score recompute
  35. 2026-09-11 19:10 UTCEG score recompute
  36. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  37. 2026-09-10 20:07 UTCEG score recompute
  38. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  39. 2026-09-09 00:40 UTCEG score recompute
  40. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  41. 2026-09-08 02:59 UTCEG score recompute
  42. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  43. 2026-09-06 16:36 UTCEG score recompute
  44. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  45. 2026-09-05 17:43 UTCEG score recompute
  46. 2026-09-04 18:44 UTCEG score recompute
  47. 2026-09-04 07:00 UTCEG score recompute
  48. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  49. 2026-09-02 20:29 UTCEG score recompute
  50. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  51. 2026-09-01 18:30 UTCEG score recompute
  52. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  53. 2026-09-01 07:01 UTCEG score recompute
  54. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  55. 2026-08-31 19:33 UTCEG score recompute
  56. 2026-08-31 18:34 UTCEG score recompute
  57. 2026-08-31 04:42 UTCEG score recompute
  58. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  59. 2026-08-30 05:48 UTCEG score recompute
  60. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  61. 2026-08-29 06:52 UTCEG score recompute
  62. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  63. 2026-08-27 20:27 UTCEG score recompute
  64. 2026-08-27 17:23 UTCEG score recomputeFirst assessed: 7.2 HIGH

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54718?
CVE-2026-54718 is a high-severity vulnerability; its CVE record was published on August 27, 2026. Silverstripe Advanced Workflow is a highly configurable step-based workflow module. Prior to 6.4.5, 7.1.3, and 7.2.1, an attacker with permission to author the advanced workflow email template can place a specially crafted server-side template payload in NotifyUsersWorkflowAction.EmailTemplate.…
When was the CVE record for CVE-2026-54718 published?
The CVE record for CVE-2026-54718 was published on August 27, 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 9, 2026; the record at its source may have been updated since.
Is CVE-2026-54718 actively exploited?
CVE-2026-54718 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (63rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54718?
CVE-2026-54718 has a CVSS base score of 7.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54718?
A fix for CVE-2026-54718 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54718 are linked in the Vendor Advisories panel on this page.

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