Is there a public exploit for CVE-2026-13149?

No public exploit for CVE-2026-13149 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-2026-13149?

CVE-2026-13149 scores CVSS 7.7 (v4.0), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.36%.

What does CVE-2026-13149 affect?

CVE-2026-13149 affects juliangruber brace-expansion.

7.7 High

brace-expansion through 5.0.6 is vulnerable to denial of service.

CVE-2026-13149

brace-expansion through 5.0.6 is vulnerable to denial of service. The expand() function exhibits exponential-time complexity in the number of consecutive non-expanding '{}' brace groups. An attacker who passes a crafted string to expand(), directly or transitively, can cause significant CPU consumption and event-loop blocking. The max option does not mitigate this, as it bounds the output size rather than the recursion work.

Assessment

CVSS: 7.7 (v4.0)
Severity: High
EPSS: 0.36% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 30 June 2026
Last updated: 25 October 2026
Affected: juliangruber · brace-expansion
Weakness: CWE-400, CWE-407
Assigner: 22e2d327-25fe-45d7-9f0c-dcd23b7108df

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber

At the source

References

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