SMTP smuggling in Apache James

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.010, the 64th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 15:13 UTC First seen by agentprime
2. 31 Oct 2026, 15:13 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-p5q9-86w4-2xr5
• OSV: GHSA-p5q9-86w4-2xr5
• nvd.nist.gov/vuln/detail/CVE-2023-51747
• github.com/apache/james-project/commit/d1ef102540e504c067b6c1721a6f1e7eee9c6fc6
• github.com/apache/james-project/commit/d5cd8bb098aa78d8d62c9645f3c532689ef1cb03
• github.com/apache/james-project
• lists.apache.org/thread/rxkwbkh9vgbl9rzx1fkllyk3krhgydko
• postfix.org/smtp-smuggling.html
• sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide
• www.openwall.com/lists/oss-security/2024/02/27/4

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.