CVE-2026-55442 Goobi viewer: cleanUpQuery double-brace bypass allows arbitrary Solr local-param injection
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-55442?
CVE-2026-55442 is a medium-severity vulnerability in intranda goobi-viewer-core, published on 23 Oct 2026.
Official description
The Goobi viewer is a web application that allows digitised material to be displayed in a web browser. From version 23.03 to before version 26.05, SolrTools.cleanUpQuery() strips Solr local-parameter syntax ({!...}) from user-supplied query strings before they reach Solr. Its regex can be bypassed by wrapping the local parameter in a second pair of curly braces ({{!...}}): the outer braces are stripped, the inner {!...} survives intact, and a valid Solr local parameter is forwarded. The flaw is in the shared sanitizer, so it affects any endpoint that routes user input through cleanUpQuery. The double-brace bypass applies from v23.10 (the greedy \{(.+)\} regex); a related bare-!join rewrap path is present. This issue has been patched in version 26.05.
Which versions are affected by CVE-2026-55442?
How do I fix CVE-2026-55442?
No fix has been published for CVE-2026-55442 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-55442 being exploited?
There is no known exploitation of CVE-2026-55442 in the wild and no public exploit code.
Sources
Also known as GHSA-2r24-qxpf-cj65.