Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Jooby's jooby-netty module, versions before 2.2.1, is vulnerable to HTTP response splitting through CRLF sequences in HTTP headers. An attacker who can get user-supplied data into response headers could inject extra headers or content, which the advisory links to cross-site scripting, cache poisoning, and page hijacking. Upgrade to jooby-netty 2.2.1 or later. If upgrading is not possible, make sure user-supplied data cannot flow into HTTP headers, or strip CRLF characters from it first.
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
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.5 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | CNA (snyk) |
- CISA KEV Not listed.
- EPSS 0.016, the 75th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:18 UTC First seen by agentprime
- 31 Oct 2026, 14:18 UTC Confirmed by OSV