What is CVE-2026-63133?

CVE-2026-63133 is a medium-severity vulnerability in Cisagov Malcolm, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-08-11.

How severe is CVE-2026-63133?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Cisagov Malcolm

CVE-2026-63133

Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` extracts uploaded archives with no limit on entry count, directory depth, total entries, or output size. A small malicious archive containing a l…

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Cisagov Malcolm — versions < 26.07.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-63133?: CVE-2026-63133 is a medium-severity vulnerability in Cisagov Malcolm, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-08-11.
How severe is CVE-2026-63133?: Medium severity. CVSS v3 base score is 6.5 out of 10.