APIFold reads an OpenAPI 3.x or Swagger 2.x specification and generates a live, production-ready MCP server endpoint. Prior to commit 7f19b52280f414f57af2b79a95333d1c8fbeece5, the /webhooks/:serverSlug/:eventName endpoint accepts arbitrary unauthenticated JSON and stores it in Redis and the webhook_events PostgreSQL table without any signature check or authentication requirement. The root cause is that createWebhookRouter is called at server.ts:188 without a validators map, so receivers.ts:80's optional-chaining guard evaluates to undefined and the signature-validation block (receiver.ts:81–95) is unconditionally skipped. Any unauthenticated network client that knows a valid server slug can inject arbitrary payloads, which are subsequently served as trusted resource state to legitimate MCP clients. Commit 7f19b52280f414f57af2b79a95333d1c8fbeece5 patches the issue.
CVE-2026-47769
This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 71% 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).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.3
- EG Score
- 5.3(medium)
- EG Risk
- 55(Attend)EG Risk 55/100SSVC: 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 computedSeverity53% × 45%Exploitation40% × 40%Automatability100% × 15%Action: Remediate soon — notable exploitation risk. - EPSS PROB
- 0%
- EPSS %ILE
- 29%
- KEV
- Not listed
Published
July 23, 2026
Last Modified
July 23, 2026
Advisory Details (3)
Auto-updated Jul 26, 2026Unauthenticated Webhook Event Injection · Advisory · Work90210/APIFold · GitHub
https://github.com/Work90210/APIFold/security/advisories/GHSA-x82h-9r8v-m672fix: enforce webhook signature validation (GHSA-x82h-9r8v-m672)
Fix merged in Work90210/APIFold PR #235 on 2026-05-19 — awaiting tagged release
https://github.com/Work90210/APIFold/pull/235commit 7f19b52280f4 (Work90210/APIFold)
Fix landed in Work90210/APIFold commit 7f19b52280f4 — awaiting tagged release
https://github.com/Work90210/APIFold/commit/7f19b52280f414f57af2b79a95333d1c8fbeece5Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 8× 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.
- 2026-07-28 05:25 UTCEG score recompute
- 2026-07-27 04:16 UTCEG score recompute
- 2026-07-26 14:54 UTCEPSS rescore
- 2026-07-26 03:07 UTCEG score recompute
- 2026-07-25 14:18 UTCEPSS rescore
- 2026-07-24 14:18 UTCEPSS rescore
- 2026-07-23 17:52 UTCEG score recompute
- 2026-07-23 17:51 UTCMITRE cvelistV5first tracked
Frequently asked(5)
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Dependency Blast Radius
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