Is there a public exploit for CVE-2026-58205?

No public exploit for CVE-2026-58205 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-58205?

CVE-2026-58205 scores CVSS 8.1 (v3.1), rated high.

8.1 High

GRR is a resource management and reservation application.

CVE-2026-58205

GRR is a resource management and reservation application. Prior to version 4.5.0, maj.php reflects the forcemaj parameter without adequate escaping when installation files remain accessible. Removal of these files is not automatic. An attacker can craft a URL that executes arbitrary JavaScript in a victim's browser when the victim accesses it. This reflected cross-site scripting can enable phishing, redirection to malicious sites, cookie theft and session hijacking because the authentication cookie is not HttpOnly. This issue is fixed in version 4.5.0.

Assessment

CVSS: 8.1 (v3.1)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 27 October 2026
Last updated: 29 October 2026
Weakness: CWE-79
Assigner: security-advisories@github.com

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

At the source

References

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