CVE-2026-40471 — CRITICAL (9.6)

Vulnerability Description

hackage-server lacked Cross-Site Request Forgery (CSRF) protection across its endpoints. Scripts on foreign sites could trigger requests to hackage server, possibly abusing latent credentials to upload packages or perform other administrative actions. Some unauthenticated actions could also be abused (e.g. creating new user accounts).

CVSS Score

9.6

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

LOW

Related Weaknesses (CWE)

CWE-352

References

https://osv.dev/vulnerability/HSEC-2026-0002

FAQ

What is CVE-2026-40471?

CVE-2026-40471 is a vulnerability with a CVSS score of 9.6 (CRITICAL). hackage-server lacked Cross-Site Request Forgery (CSRF) protection across its endpoints. Scripts on foreign sites could trigger requests to hackage server, possibly abusing latent credentials to uploa...

How severe is CVE-2026-40471?

CVE-2026-40471 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-40471?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.