DEBIAN-CVE-2026-82617
The two built-in name-finder patterns exposed by opennlp.tools.namefind.RegexNameFinderFactory - DEFAULT_REGEX_NAME_FINDER.EMAIL and DEFAULT_REGEX_NAME_FINDER.URL - contain ambiguous nested quantifiers. An application that obtains these finders through RegexNameFinderFactory.getDefaultRegexNameFinders(...) and then applies them to untrusted text through RegexNameFinder.find(String[]) or RegexNameFinder.find(String) can be driven into super-linear backtracking or into unbounded matcher recursion by a small crafted input. For the EMAIL pattern, a long run of local-part characters that is never followed by an @ forces the matcher to re-scan to end-of-input from every starting offset. Cost grows quadratically with input length: an input of approximately 32 KB consumes several seconds of CPU in a single find() call and returns no match, and each doubling of the input multiplies the cost roughly four-fold. For the URL pattern, the query-string sub-expression nests a capturing repetition inside an outer repetition. The JDK matcher recurses once per query token, so an input of approximately 4 KB containing many &-separated tokens exhausts the thread stack and causes java.lang.StackOverflowError to propagate out of find(), terminating the calling thread. On a thread created with a smaller stack (for example -Xss512k, typical of server worker pools) approximately 1 KB is sufficient. In both cases an attacker who can supply text for analysis can convert a single request into seconds to
DEBIAN-CVE-2026-82617
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-82617
apache-opennlp
Source reference: /affected/0/package/name
- Affected versions
- 2.1.0-1
Source reference:
/affected/0/versions2.2.0-1Source reference:
/affected/0/versions2.2.0-1~expSource reference:
/affected/0/versions2.3.0-1Source reference:
/affected/0/versions2.3.1-1Source reference:
/affected/0/versions2.3.1-2Source reference:
/affected/0/versions2.3.2-1Source reference:
/affected/0/versions2.3.3-1Source reference:
/affected/0/versions2.4.0-1Source reference:
/affected/0/versions2.5.0-1Source reference:
/affected/0/versions2.5.1-1Source reference:
/affected/0/versions2.5.12-1Source reference:
/affected/0/versions2.5.2-1Source reference:
/affected/0/versions2.5.3-1Source reference:
/affected/0/versions2.5.9-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
apache-opennlp
Source reference: /affected/1/package/name
- Affected versions
- 2.5.12-1
Source reference:
/affected/1/versions2.5.3-1Source reference:
/affected/1/versions2.5.9-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
apache-opennlp
Source reference: /affected/2/package/name
- Affected versions
- 2.5.3-1
Source reference:
/affected/2/versions2.5.9-1Source reference:
/affected/2/versions - Fixed versions
- 2.5.12-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "apache-opennlp",
"purl": "pkg:deb/debian/apache-opennlp?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.1.0-1",
"2.2.0-1",
"2.2.0-1~exp",
"2.3.0-1",
"2.3.1-1",
"2.3.1-2",
"2.3.2-1",
"2.3.3-1",
"2.4.0-1",
"2.5.0-1",
"2.5.1-1",
"2.5.12-1",
"2.5.2-1",
"2.5.3-1",
"2.5.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82617.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "apache-opennlp",
"purl": "pkg:deb/debian/apache-opennlp?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.5.12-1",
"2.5.3-1",
"2.5.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82617.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.5.12-1"
}
]
}
],
"package": {
"name": "apache-opennlp",
"purl": "pkg:deb/debian/apache-opennlp?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.5.3-1",
"2.5.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82617.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58369 · Revision 1
- Added to Heist Feed
- Publisher date