CVE-2026-55454

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 52% 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
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 9.9Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

Appsmith is a platform to build admin panels, internal tools, and dashboards. Prior to 2.1, the bundled Caddy reverse-proxy's admin API — which has no authentication by default — is bound on 0.0.0.0:2019 inside the container. While this listener is not directly published to the host by docker-compose.yml, it is reachable from the Appsmith server process itself or a SSRF vulnerability. An authenticated low-privileged user can therefore drive the SSRF to issue POST /load (or any other admin-API call) against http://0.0.0.0:2019/, fully replacing the live Caddy configuration and taking over the reverse proxy. This vulnerability is fixed in 2.1.

CVSS v3
9.9
EG Score
9.9CRITICALmedium confidence
EG Risk
49
EG Risk 49/100

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
Severity99% × 45%
Exploitation1% × 40%
Automatability30% × 15%
EPSS PROB
0.6%
EPSS %ILE
47th
KEV
Not listed

Published

June 24, 2026

Last Modified

June 26, 2026

Advisory Details (1)

Auto-updated Oct 4, 2026
Fix named in the CVE record. Sources: github.
githubMentions a patch (unverified)

Caddy admin API exposed without authentication · Advisory · appsmithorg/appsmith · GitHub

https://github.com/appsmithorg/appsmith/security/advisories/GHSA-8jvv-gwqg-6vjc

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 28× 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 146 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:12 UTCEPSS rescore
  3. 2026-10-07 23:48 UTCEPSS rescore
  4. 2026-10-06 15:18 UTCEPSS rescore
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  17. 2026-09-23 09:49 UTCEG score recompute
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  24. 2026-09-14 01:31 UTCEG score recompute
  25. 2026-09-13 16:47 UTCEPSS rescore
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  1. 2026-09-12 16:05 UTCEG score recompute
  2. 2026-09-11 14:53 UTCEPSS rescore
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  11. 2026-08-30 19:49 UTCEG score recompute
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  19. 2026-08-24 21:53 UTCEG score recompute
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  22. 2026-08-23 00:19 UTCEPSS rescore
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  24. 2026-08-21 23:49 UTCEPSS rescore
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  26. 2026-08-20 22:55 UTCEPSS rescore
  27. 2026-08-20 07:13 UTCEG score recompute
  28. 2026-08-19 17:04 UTCEPSS rescore
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  30. 2026-08-18 13:48 UTCEPSS rescore
  31. 2026-08-17 16:58 UTCEG score recompute
  32. 2026-08-17 13:47 UTCEPSS rescore
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  39. 2026-08-13 22:29 UTCEG score recompute
  40. 2026-08-13 22:00 UTCEPSS rescore
  41. 2026-08-12 14:05 UTCEG score recompute
  42. 2026-08-12 13:51 UTCEPSS rescore
  43. 2026-08-11 14:08 UTCEG score recompute
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  46. 2026-08-09 14:58 UTCEG score recompute
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  48. 2026-08-08 19:28 UTCEG score recompute
  49. 2026-08-08 16:37 UTCEPSS rescore
  50. 2026-08-07 19:59 UTCEG score recompute
  51. 2026-08-06 16:40 UTCEG score recompute
  52. 2026-08-06 13:47 UTCEPSS rescore
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  65. 2026-07-30 19:20 UTCEG score recompute
  66. 2026-07-30 16:28 UTCEPSS rescore
  67. 2026-07-30 09:59 UTCEG score recompute
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  71. 2026-07-28 15:37 UTCEPSS rescore
  72. 2026-07-27 17:32 UTCEG score recompute
  73. 2026-07-26 15:20 UTCEG score recompute
  74. 2026-07-26 14:54 UTCEPSS rescore
  75. 2026-07-25 14:18 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-55454?
CVE-2026-55454 is a critical vulnerability published on June 24, 2026. Appsmith is a platform to build admin panels, internal tools, and dashboards. Prior to 2.1, the bundled Caddy reverse-proxy's admin API — which has no authentication by default — is bound on 0.0.0.0:2019 inside the container. While this listener is not directly published to the host by…
When was CVE-2026-55454 disclosed?
CVE-2026-55454 was first published on June 24, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55454 actively exploited?
CVE-2026-55454 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (47th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55454?
CVE-2026-55454 has a CVSS base score of 9.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55454?
The CVE record for CVE-2026-55454 names the fix: "This vulnerability is fixed in 2.1."

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