CVE-2019-11068 — libxslt through 1

libxslt through 1.1.33 allows bypass of a protection mechanism because callers of xsltCheckRead and xsltCheckWrite permit access even upon receiving a -1 error code. xsltCheckRead can return -1 for a crafted URL that is not actually invalid and is subsequently loaded.

01What is this vulnerability?

libxslt through 1.1.33 allows bypass of a protection mechanism because callers of xsltCheckRead and xsltCheckWrite permit access even upon receiving a -1 error code. xsltCheckRead can return -1 for a crafted URL that is not actually invalid and is subsequently loaded.

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: 2019-04-10T20:29:01.147
• Last modified: 2026-05-28T19:16:28.143

09References

• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00048.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00052.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00053.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00025.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00001.html
• www.openwall.com — http://www.openwall.com/lists/oss-security/2019/04/22/1
• www.openwall.com — http://www.openwall.com/lists/oss-security/2019/04/23/5
• gitlab.gnome.org — https://gitlab.gnome.org/GNOME/libxslt/commit/e03553605b45c88f0b4b2980adfbbb8f6f…
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2019/04/msg00016.html
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…