UnratedRed Hat & Ubuntu Linux
multipart vulnerability
USN-8343-1 Published May 28, 2026
CVE-2026-28356
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
It was discovered that multipart had an ambiguous regular expression alternation when handling certain HTTP header values. A remote attacker could possibly use this issue to cause multipart to use excessive resources, leading to a denial of service. Affected Ubuntu releases: 26.04, 25.10. CVEs: CVE-2026-28356.
Affected versions
- Ubuntu 26.04
- Ubuntu 25.10
Official advisory · medium-confidence parse· fetched 3 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Apply available updates: `sudo apt update && sudo apt upgrade` (a standard system update installs the fix).
Official advisory · medium-confidence parse· fetched 3 hours ago·verify at source
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