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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-116",
"CWE-20"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55442.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "23.03"
},
{
"fixed": "26.05"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
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}
],
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},
{
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{
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}
],
"source": "REFERENCES_COMMIT"
},
{
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"range": [
{
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}
],
"source": "REFERENCES_TAG"
}
]
}
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55442.json"
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}
]
"2026-10-31T07:03:11Z"