Apache Solr vulnerable to XML Bomb

HIGH 7.5CVE-2019-12401 · GHSA-jq2w-w7v2-69q5 · Published 10/09/2019 · updated 17/06/2026

In short

CVE-2019-12401 is a HIGH (CVSS 7.5) vulnerability affecting org.apache.solr:solr-core, solr (apache).
Chance of exploitation in the next 30 days (EPSS): 8.5%, higher than 95.1% of all vulnerabilities.
Fix: update to 5.0.0 or later.

Package	Affected versions	Patched versions
org.apache.solr:solr-core Maven	`< 5.0.0`	`5.0.0`
solr apache	`≥ 1.3.0, ≤ 1.4.1≥ 3.1, ≤ 3.6.2≥ 4.0.0, ≤ 4.10.4`	No fix yet

Description

Solr versions prior to 5.0.0 are vulnerable to an XML resource consumption attack (a.k.a. Lol Bomb) via it?s update handler.?By leveraging XML DOCTYPE and ENTITY type elements, the attacker can create a pattern that will expand when the server parses the XML causing OOMs.

NVD description

Solr versions 1.3.0 to 1.4.1, 3.1.0 to 3.6.2 and 4.0.0 to 4.10.4 are vulnerable to an XML resource consumption attack (a.k.a. Lol Bomb) via it’s update handler.?By leveraging XML DOCTYPE and ENTITY type elements, the attacker can create a pattern that will expand when the server parses the XML causing OOMs.

References

More vulnerabilities in org.apache.solr:solr-core

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