========================================================================== Ubuntu Security Notice USN-8343-1 May 28, 2026
multipart vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 Summary: multipart could be made to use excessive resources if it received specially crafted input. Software Description: - multipart: library for handling multipart/form-data POST requests Details: 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. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS python3-multipart 1.3.0-3ubuntu0.1 Ubuntu 25.10 python3-multipart 1.2.1-2+deb13u1build0.25.10.1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8343-1 CVE-2026-28356 Package Information: https://launchpad.net/ubuntu/+source/multipart/1.3.0-3ubuntu0.1 https://launchpad.net/ubuntu/+source/multipart/1.2.1-2+deb13u1build0.25.10.1
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