CVE-2023-34411 — The xml-rs crate before 0

The xml-rs crate before 0.8.14 for Rust and Crab allows a denial of service (panic) via an invalid <! token (such as <!DOCTYPEs/%<!A nesting) in an XML document. The earliest affected version is 0.8.9.

01What is this vulnerability?

The xml-rs crate before 0.8.14 for Rust and Crab allows a denial of service (panic) via an invalid <! token (such as <!DOCTYPEs/%<!A nesting) in an XML document. The earliest affected version is 0.8.9.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-06-05T00:00:00.000Z
• Last modified: 2025-01-08T16:54:17.920Z

09References

• github.com — https://github.com/netvl/xml-rs/pull/226
• github.com — https://github.com/00xc/xml-rs/commit/0f084d45aa53e4a27476961785f59f2bd7d59a9f
• github.com — https://github.com/netvl/xml-rs/compare/0.8.13...0.8.14
• github.com — https://github.com/netvl/xml-rs/commit/c09549a187e62d39d40467f129e64abf32efc35c