It was discovered that Exim incorrectly handled parsing malformed JSON in message headers. A remote attacker could possibly use this issue to execute arbitrary code. ( CVE-2026-40685 ) It was discovered that Exim incorrectly handled processing of UTF-8 trailing characters. A remote attacker could possibly use this issue to obtain sensitive information. ( CVE-2026-40686 ) It was discovered that Exim incorrectly handled SPA authenticator input. An authenticated user could possibly use this issue to execute arbitrary code. ( CVE-2026-40687 )
It was discovered that Exim incorrectly handled parsing malformed JSON in message headers. A remote attacker could possibly use this issue to execute arbitrary code. ( CVE-2026-40685 )
It was discovered that Exim incorrectly handled processing of UTF-8 trailing characters. A remote attacker could possibly use this issue to obtain sensitive information. ( CVE-2026-40686 )
It was discovered that Exim incorrectly handled SPA authenticator input. An authenticated user could possibly use this issue to execute arbitrary code. ( CVE-2026-40687 )
It was discovered that Exim incorrectly handled parsing malformed JSON in message headers. A remote attacker could possibly use this issue to execute arbitrary code. ( CVE-2026-40685 ) It was discovered that Exim incorrectly handled processing of UTF-8 trailing characters. A remote attacker could possibly use this issue to obtain sensitive information. ( CVE-2026-40686 ) It was discovered that Exim incorrectly handled SPA authenticator input. An authenticated user could possibly use this issue to execute arbitrary code. ( CVE-2026-40687 )
It was discovered that Exim incorrectly handled parsing malformed JSON in message headers. A remote attacker could possibly use this issue to execute arbitrary code. ( CVE-2026-40685 )
It was discovered that Exim incorrectly handled processing of UTF-8 trailing characters. A remote attacker could possibly use this issue to obtain sensitive information. ( CVE-2026-40686 )
It was discovered that Exim incorrectly handled SPA authenticator input. An authenticated user could possibly use this issue to execute arbitrary code. ( CVE-2026-40687 )
In general, a standard system update will make all the necessary changes.
The problem can be corrected by updating your system to the following package versions:
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.
The full story
This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.
