CVE-2026-73849

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 53% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

Emlog is an open source website building system. In 2.6.26 and earlier, install.php accepts action=reinstall without authentication and deliberately skips the already-installed check because the guard runs only when $act != 'reinstall'. A remote attacker can submit hostname, dbuser, dbpasswd, dbname, dbprefix, username, password, and email values to cause file_put_contents('config.php', $config) to overwrite the configuration with attacker-controlled database settings and create a new administrator account. No fixed version is available as of this review.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

August 14, 2026

Last Modified

September 16, 2026

Advisory Details (1)

Auto-updated Sep 16, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

emlog pro-2.6.19 (and earlier) allows unauthenticated reinstallation via `install.php?action=reinstall`. · Advisory · emlog/emlog · GitHub

https://github.com/emlog/emlog/security/advisories/GHSA-v5qq-p8mp-3gxm

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 54× 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.

  1. 2026-09-21 00:07 UTCEG score recompute
  2. 2026-09-20 20:16 UTCEPSS rescore
  3. 2026-09-19 16:15 UTCEG score recompute
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  20. 2026-09-10 09:35 UTCEPSS rescore
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  22. 2026-09-08 22:01 UTCEPSS rescore
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  24. 2026-09-06 17:50 UTCEG score recompute
  25. 2026-09-06 13:48 UTCEPSS rescore
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  1. 2026-09-05 17:06 UTCEG score recompute
  2. 2026-09-04 14:26 UTCEG score recompute
  3. 2026-09-04 06:12 UTCEG score recompute
  4. 2026-09-04 05:07 UTCEPSS rescore
  5. 2026-09-02 22:56 UTCEG score recompute
  6. 2026-09-02 14:12 UTCEPSS rescore
  7. 2026-09-01 15:19 UTCEG score recompute
  8. 2026-09-01 13:54 UTCEPSS rescore
  9. 2026-09-01 06:10 UTCEG score recompute
  10. 2026-09-01 04:40 UTCEPSS rescore
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  12. 2026-08-30 20:54 UTCEG score recompute
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  17. 2026-08-29 06:54 UTCEG score recompute
  18. 2026-08-28 21:42 UTCEPSS rescore
  19. 2026-08-27 16:13 UTCEG score recompute
  20. 2026-08-27 14:25 UTCEPSS rescore
  21. 2026-08-26 18:42 UTCEG score recompute
  22. 2026-08-26 14:47 UTCEPSS rescore
  23. 2026-08-25 16:39 UTCEG score recompute
  24. 2026-08-25 13:49 UTCEPSS rescore
  25. 2026-08-24 15:41 UTCEG score recompute
  26. 2026-08-24 14:18 UTCEPSS rescore
  27. 2026-08-24 11:32 UTCEG score recompute
  28. 2026-08-23 02:32 UTCEG score recompute
  29. 2026-08-23 00:19 UTCEPSS rescore
  30. 2026-08-22 01:49 UTCEG score recompute
  31. 2026-08-21 23:49 UTCEPSS rescore
  32. 2026-08-21 01:00 UTCEG score recompute
  33. 2026-08-20 22:56 UTCEPSS rescore
  34. 2026-08-19 20:03 UTCEG score recompute
  35. 2026-08-19 17:04 UTCEPSS rescore
  36. 2026-08-18 14:58 UTCEG score recompute
  37. 2026-08-18 13:49 UTCEPSS rescore
  38. 2026-08-18 13:49 UTCEPSS rescore
  39. 2026-08-18 06:26 UTCEG score recompute
  40. 2026-08-18 02:19 UTCEG score recompute
  41. 2026-08-17 16:28 UTCEG score recompute
  42. 2026-08-17 13:47 UTCEPSS rescore
  43. 2026-08-16 15:44 UTCEG score recompute
  44. 2026-08-16 14:56 UTCEPSS rescore
  45. 2026-08-16 14:56 UTCEPSS rescore
  46. 2026-08-16 03:25 UTCEG score recompute
  47. 2026-08-16 02:15 UTCEPSS rescore
  48. 2026-08-14 18:35 UTCEG score recompute
  49. 2026-08-14 17:49 UTCEG score recompute
  50. 2026-08-14 17:48 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73849?
CVE-2026-73849 is a critical vulnerability published on August 14, 2026. Emlog is an open source website building system. In 2.6.26 and earlier, install.php accepts action=reinstall without authentication and deliberately skips the already-installed check because the guard runs only when $act != 'reinstall'. A remote attacker can submit hostname, dbuser, dbpasswd,…
When was CVE-2026-73849 disclosed?
CVE-2026-73849 was first published in the National Vulnerability Database on August 14, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73849 actively exploited?
CVE-2026-73849 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 53.1% of all scored CVEs.
What is the CVSS score of CVE-2026-73849?
CVE-2026-73849 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-73849?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73849, 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.

Dependency Blast Radius

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