REXML ReDoS vulnerability
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 reference (&#x...;). This does not happen with Ruby 3.2 or later. Ruby 3.1 is the only affected maintained Ruby. The REXML gem 3.3.9 or later include the patch to fix the vulnerability.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-10990US | — | — | ||
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 document… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/49xxx/CVE-2024-49761.jsonADVISORY
- https://github.com/ruby/rexml/commit/ce59f2eb1aeb371fe1643414f06618dbe031979fFIX
- https://github.com/ruby/rexml/security/advisories/GHSA-2rxp-v6pw-ch6mADVISORY
- https://lists.debian.org/debian-lts-announce/2025/01/msg00011.htmlWEB
- https://nvd.nist.gov/vuln/detail/CVE-2024-49761ADVISORY
- https://security.netapp.com/advisory/ntap-20241227-0004/ADVISORY
- https://www.ruby-lang.org/en/news/2024/10/28/redos-rexml-cve-2024-49761WEB
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