CVE-2026-73679

HIGHPre-NVD 7.27.2—
EchelonGraph scoreMEDIUM confidence

Score 7.2 from GitHub Security Advisory (severity: HIGH) published 2026-08-14. The CNA's CVSS baseline 7.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this week
7.2EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 7.2Exploit: None knownExposed services: Not assessed

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

ImpressCMS contains an authenticated remote code execution vulnerability in the custom tag module that allows authenticated administrators to execute arbitrary PHP code by storing a malicious payload in a custom tag with PHP type enabled. The application decodes HTML-encoded content via undoHtmlSpecialChars() before passing it to eval() in the renderWithPhp() method, bypassing HTML Purifier sanitization, and the payload is triggered on every frontend page load through the preload event system.

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

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
Severity72% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
1.1%
EPSS %ILE
65th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 14, 2026

Last Modified

October 1, 2026

Advisory Details (3)

Auto-updated Aug 14, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

ImpressCMS Authenticated RCE via PHP Custom Tag eval() | Advisories | VulnCheck

https://www.vulncheck.com/advisories/impresscms-authenticated-rce-via-php-custom-tag-eval
generic🟡 PoC Available

VULN-POC/ImpressCMSRCCE.md at main · DevVaibhav07/VULN-POC · GitHub

https://github.com/DevVaibhav07/VULN-POC/blob/main/ImpressCMSRCCE.md
generic

GitHub - ImpressCMS/impresscms: A multilingual, extensible, community oriented CMS developed in PHP · GitHub

https://github.com/ImpressCMS/impresscms

Vendor Advisories for CVE-2026-73679(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 20× in last 7d / 100× 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 193 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-73679?
CVE-2026-73679 is a high vulnerability published on August 14, 2026. ImpressCMS contains an authenticated remote code execution vulnerability in the custom tag module that allows authenticated administrators to execute arbitrary PHP code by storing a malicious payload in a custom tag with PHP type enabled. The application decodes HTML-encoded content via…
When was CVE-2026-73679 disclosed?
CVE-2026-73679 was first published on August 14, 2026, with the most recent update on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73679 actively exploited?
CVE-2026-73679 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.1% probability of exploitation in the next 30 days (65th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73679?
CVE-2026-73679 has a CVSS base score of 7.2 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-73679?
No fix for CVE-2026-73679 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 vendor advisories EchelonGraph has for CVE-2026-73679 are linked in the Vendor Advisories panel on this page.

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