CVE-2026-100849

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-27. A secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.1Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

AzuraCast is a self-hosted web radio management suite. In AzuraCast before 0.23.8, the station webhook URL validation in AbstractConnector::getValidUrl() (backend/src/Webhook/Connector/AbstractConnector.php), used by the Generic and Discord webhook connectors, rejects only URLs whose host is a literal link-local IP address (169.254.0.0/16 or fe80::/10). Loopback addresses and RFC1918 private ranges are not rejected, and any non-literal-IP hostname causes the IP parsing call to throw, which skips the check entirely. A user holding only the station-scoped WebHooks permission can therefore configure a webhook pointing at an internal, loopback, or private-network target and cause the server to issue an outbound HTTP POST containing the station's Now Playing data, resulting in server-side request forgery. The PUT /station/{id}/webhook/{id}/test endpoint allows the same low-privileged user to trigger the request on demand. At the time of the advisory no patched version was available.

CVSS v3
7.1
EG Score
7.1HIGHhigh confidence
EG Risk
48
EG Risk 48/100CISA 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
Severity71% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
13th
KEV
Not listed

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

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

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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

September 27, 2026

Last Modified

September 28, 2026

Advisory Details (2)

Auto-updated Sep 27, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

AzuraCast before 0.23.8 SSRF Filter Bypass via Hostname and Private IPs | Advisories | VulnCheck

https://www.vulncheck.com/advisories/azuracast-before-0.23.8-ssrf-filter-bypass-via-hostname-and-private-ips
github Patch Available🟡 PoC Available

SSRF filter bypass in Station Webhooks via hostname and non-link-local private IPs · Advisory · AzuraCast/AzuraCast · GitHub

https://github.com/AzuraCast/AzuraCast/security/advisories/GHSA-3jp3-3wqw-jvw4

Vendor Advisories for CVE-2026-100849(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 31× in last 7d / 37× 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. 2026-10-05 04:55 UTCEG score recompute
  2. 2026-10-05 04:55 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 16:26 UTCGHSA enrichment
  5. 2026-10-04 03:57 UTCGHSA enrichment
  6. 2026-10-03 15:26 UTCEG score recompute
  7. 2026-10-03 15:25 UTCGHSA enrichment
  8. 2026-10-03 14:25 UTCEPSS rescore
  9. 2026-10-03 02:50 UTCEG score recompute
  10. 2026-10-03 02:50 UTCGHSA enrichment
  11. 2026-10-02 14:20 UTCGHSA enrichment
  12. 2026-10-02 01:47 UTCEG score recompute
  13. 2026-10-02 01:46 UTCGHSA enrichment
  14. 2026-10-01 19:49 UTCEPSS rescore
  15. 2026-10-01 13:13 UTCGHSA enrichment
  16. 2026-10-01 00:45 UTCEG score recompute
  17. 2026-10-01 00:45 UTCGHSA enrichment
  18. 2026-09-30 15:02 UTCEPSS rescore
  19. 2026-09-30 12:16 UTCGHSA enrichment
  20. 2026-09-29 23:47 UTCEG score recompute
  21. 2026-09-29 23:47 UTCGHSA enrichment
  22. 2026-09-29 15:20 UTCEPSS rescore
  23. 2026-09-29 09:42 UTCEG score recompute
  24. 2026-09-29 09:41 UTCGHSA enrichment
  25. 2026-09-28 21:13 UTCEG score recompute
Show 12 more
  1. 2026-09-28 21:13 UTCGHSA enrichment
  2. 2026-09-28 14:26 UTCEG score recompute
  3. 2026-09-28 14:26 UTCGHSA enrichment
  4. 2026-09-28 14:02 UTCEG score recompute
  5. 2026-09-28 14:02 UTCGHSA enrichment
  6. 2026-09-28 13:50 UTCEPSS rescore
  7. 2026-09-28 03:40 UTCGHSA enrichment
  8. 2026-09-27 15:07 UTCEG score recompute
  9. 2026-09-27 15:07 UTCGHSA enrichment
  10. 2026-09-27 02:36 UTCEG score recompute
  11. 2026-09-27 01:53 UTCEG score recompute
  12. 2026-09-27 01:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-100849?
CVE-2026-100849 is a high vulnerability published on September 27, 2026. AzuraCast is a self-hosted web radio management suite. In AzuraCast before 0.23.8, the station webhook URL validation in AbstractConnector::getValidUrl() (backend/src/Webhook/Connector/AbstractConnector.php), used by the Generic and Discord webhook connectors, rejects only URLs whose host is a…
When was CVE-2026-100849 disclosed?
CVE-2026-100849 was first published on September 27, 2026, with the most recent update on September 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-100849 actively exploited?
CVE-2026-100849 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100849?
CVE-2026-100849 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100849?
A fix for CVE-2026-100849 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-100849 are linked in the Vendor Advisories panel on this page.

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