CVE-2026-86100

MEDIUMPre-NVD 6.46.4—
EchelonGraph scoreHIGH confidence

Score 6.4 from GitHub Security Advisory published 2026-09-05. a secondary CVSS source baseline 6.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.4Exploit: None knownExposed: 0

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

Camaleon CMS versions 2.7.5 through 2.9.1 fail to validate redirect targets when fetching remote files in the Upload from URL media feature. Authenticated attackers can supply URLs that pass initial validation but redirect to internal network addresses, allowing server-side request forgery to internal services.

CVSS v3
6.4
EG Score
6.4(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

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
Severity64% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

September 4, 2026

Last Modified

September 8, 2026

Advisory Details (6)

Auto-updated Sep 4, 2026
Patch available. Sources: github_pr, github_commit, github_release.
generic

Camaleon CMS 2.7.5 through 2.9.1 SSRF via HTTP Redirect in Upload from URL | Advisories | VulnCheck

https://www.vulncheck.com/advisories/camaleon-cms-2.7.5-through-2.9.1-ssrf-via-http-redirect-in-upload-from-url
github_release Patch Available

2.9.2

Patch available: owen2345/camaleon-cms 2.9.2

https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2
generic

camaleon-cms/app/helpers/camaleon_cms/uploader_helper.rb at 2.9.1 · owen2345/camaleon-cms · GitHub

https://github.com/owen2345/camaleon-cms/blob/2.9.1/app/helpers/camaleon_cms/uploader_helper.rb
github_commit Patch Available

commit 3c46b6e51251 (owen2345/camaleon-cms)

Patch available: owen2345/camaleon-cms 2.9.2 (contains commit 3c46b6e51251)

https://github.com/owen2345/camaleon-cms/commit/3c46b6e512518ded476226162305c8eae00aac3f
github_pr Patch Available

Fix SSRF vulnerability in 'Upload from url' media feature

Patch available: owen2345/camaleon-cms 2.9.2 (PR #1133 merged 2026-03-28)

https://github.com/owen2345/camaleon-cms/pull/1133
generic

GitHub - owen2345/camaleon-cms: Camaleon CMS is a dynamic and advanced content management system based on Ruby on Rails · GitHub

https://github.com/owen2345/camaleon-cms

Vendor Advisories for CVE-2026-86100(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 19× in last 7d / 48× 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. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 15:22 UTCEG score recompute
  3. 2026-09-20 15:22 UTCGHSA enrichment
  4. 2026-09-19 13:45 UTCEG score recompute
  5. 2026-09-19 13:45 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 12:10 UTCEG score recompute
  8. 2026-09-18 12:10 UTCGHSA enrichment
  9. 2026-09-17 19:32 UTCEPSS rescore
  10. 2026-09-17 10:36 UTCEG score recompute
  11. 2026-09-17 10:36 UTCGHSA enrichment
  12. 2026-09-16 14:09 UTCEPSS rescore
  13. 2026-09-16 09:00 UTCEG score recompute
  14. 2026-09-16 09:00 UTCGHSA enrichment
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-15 07:17 UTCEG score recompute
  17. 2026-09-15 07:17 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-14 05:42 UTCEG score recompute
  21. 2026-09-14 05:42 UTCGHSA enrichment
  22. 2026-09-13 04:07 UTCEG score recompute
  23. 2026-09-13 04:07 UTCGHSA enrichment
  24. 2026-09-12 02:32 UTCEG score recompute
  25. 2026-09-12 02:32 UTCGHSA enrichment
Show 23 more
  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 14:53 UTCEPSS rescore
  3. 2026-09-11 00:56 UTCEG score recompute
  4. 2026-09-11 00:56 UTCGHSA enrichment
  5. 2026-09-09 23:21 UTCEG score recompute
  6. 2026-09-09 23:21 UTCGHSA enrichment
  7. 2026-09-08 22:01 UTCEPSS rescore
  8. 2026-09-08 20:14 UTCGHSA enrichment
  9. 2026-09-08 19:56 UTCEG score recompute
  10. 2026-09-08 19:56 UTCGHSA enrichment
  11. 2026-09-08 18:15 UTCEG score recompute
  12. 2026-09-08 18:15 UTCGHSA enrichment
  13. 2026-09-08 05:12 UTCEG score recompute
  14. 2026-09-08 05:12 UTCGHSA enrichment
  15. 2026-09-07 03:36 UTCEG score recompute
  16. 2026-09-07 03:35 UTCGHSA enrichment
  17. 2026-09-06 13:48 UTCEPSS rescore
  18. 2026-09-06 01:57 UTCEG score recompute
  19. 2026-09-06 01:56 UTCGHSA enrichment
  20. 2026-09-05 15:31 UTCEPSS rescore
  21. 2026-09-05 00:19 UTCEG score recompute
  22. 2026-09-04 23:20 UTCEG score recompute
  23. 2026-09-04 23:19 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86100?
CVE-2026-86100 is a medium vulnerability published on September 4, 2026. Camaleon CMS versions 2.7.5 through 2.9.1 fail to validate redirect targets when fetching remote files in the Upload from URL media feature. Authenticated attackers can supply URLs that pass initial validation but redirect to internal network addresses, allowing server-side request forgery to…
When was CVE-2026-86100 disclosed?
CVE-2026-86100 was first published in the National Vulnerability Database on September 4, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86100 actively exploited?
CVE-2026-86100 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.5% of all scored CVEs.
What is the CVSS score of CVE-2026-86100?
CVE-2026-86100 has a CVSS v3 base score of 6.4 (NVD).
How do I remediate CVE-2026-86100?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86100, 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

Explore the affected products and dependency analysis for CVE-2026-86100

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