CVE-2019-13118 — In numbers

In numbers.c in libxslt 1.1.33, a type holding grouping characters of an xsl:number instruction was too narrow and an invalid character/length combination could be passed to xsltNumberFormatDecimal, leading to a read of uninitialized stack data.

01What is this vulnerability?

In numbers.c in libxslt 1.1.33, a type holding grouping characters of an xsl:number instruction was too narrow and an invalid character/length combination could be passed to xsltNumberFormatDecimal, leading to a read of uninitialized stack data.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

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: 2019-07-01T02:15:09.800
• Last modified: 2026-05-28T19:16:29.950

09References

• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00062.html
• seclists.org — http://seclists.org/fulldisclosure/2019/Aug/11
• seclists.org — http://seclists.org/fulldisclosure/2019/Aug/13
• seclists.org — http://seclists.org/fulldisclosure/2019/Aug/14
• seclists.org — http://seclists.org/fulldisclosure/2019/Aug/15
• seclists.org — http://seclists.org/fulldisclosure/2019/Jul/22
• seclists.org — http://seclists.org/fulldisclosure/2019/Jul/23
• seclists.org — http://seclists.org/fulldisclosure/2019/Jul/24
• seclists.org — http://seclists.org/fulldisclosure/2019/Jul/26
• seclists.org — http://seclists.org/fulldisclosure/2019/Jul/31