Vulnerability · Published Sep 18, 2026 · Assigned by GitHub_M

CVE-2026-63647CordysCRM SSE Notification Stream Hijack via `/sse/subscribe`

Critical 9.3

In plain English

A critical-severity missing authentication in CordysCRM from 1Panel-dev. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 4.0)9.3Critical

Exploit odds (30 days)0.5%top 57.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

CordysCRM is an open source AI-powered customer relationship management system that supports private deployment. Prior to 1.7.2, SseController exposes the anonymous /sse/subscribe, /sse/broadcast, and /sse/close endpoints because ShiroFilter.addPublicPathFilters permits the SSE paths, and the endpoints trust the caller-controlled userId instead of deriving an identity from an authenticated principal. An unauthenticated caller can use /sse/subscribe to read another user's workflow events, approval requests, mentions, and alerts, use /sse/broadcast to inject SYSTEM_HEARTBEAT messages into another user's stream, or use /sse/close to terminate another user's channel. This vulnerability is fixed in 1.7.2.

Affected products (as reported)

Vendor	Product	Versions
1Panel-dev	CordysCRM	< 1.7.2

Weakness: CWE-306, CWE-639 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

References

https://github.com/1Panel-dev/CordysCRM/security/advisories/GHSA-9qg8-cm35-xqp4 x_refsource_CONFIRM
https://github.com/1Panel-dev/CordysCRM/pull/2719 x_refsource_MISC
https://github.com/1Panel-dev/CordysCRM/commit/6cb81deb53434ae7792673c50312ff91685d7f9d x_refsource_MISC
https://github.com/1Panel-dev/CordysCRM/releases/tag/v1.7.2 x_refsource_MISC