Rexml: rexml: denial of service via inefficient regex parsing
A flaw was found in REXML. A remote attacker could exploit inefficient regular expression (regex) parsing when processing hex numeric character references (&#x...;) in XML documents. This could lead to a Regular Expression Denial of Service (ReDoS), impacting the availability of the affected component. This issue is the result of an incomplete fix for CVE-2024-49761.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2024-49761US | high7.5 | — | ||
REXML is an XML toolkit for Ruby. The REXML gem before 3.3.9 has a ReDoS vulnerability when it parses an XML that has many digits between &# and x...; in a hex numeric character re… | ||||
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references
External citations — patches, advisories, analysis.
- https://access.redhat.com/downloads/content/package-browser/WEB
- https://access.redhat.com/errata/RHSA-2025:17606ADVISORY
- https://access.redhat.com/errata/RHSA-2025:17613ADVISORY
- https://access.redhat.com/errata/RHSA-2025:17693ADVISORY
- https://access.redhat.com/security/cve/CVE-2025-10990ADVISORY
- https://bugzilla.redhat.com/show_bug.cgi?id=2398216REPORT
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/10xxx/CVE-2025-10990.jsonADVISORY
- https://github.com/ruby/rexml/commit/ce59f2eb1aeb371fe1643414f06618dbe031979fFIX
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