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CVE-2012-6139

20
FAUCET Score

CVE-2012-6139 describes a denial-of-service vulnerability in libxslt versions prior to 1.1.28, affecting products like opensuse libxslt and xmlsoft libxslt. Attackers can trigger a NULL pointer dereference and crash by providing an empty match attribute in an XSL key or an uninitialized variable to specific functions. With a CVSS score of 5.0, this vulnerability is of medium severity, requiring no authentication and having low attack complexity, but only resulting in partial availability impact. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.1.27CPE matchmatch criteria
cpe:2.3:a:xmlsoft:libxslt:*:*:*:*:*:*:*:*
0.0.1CPE matchmatch criteria
cpe:2.3:a:xmlsoft:libxslt:0.0.1:*:*:*:*:*:*:*
0.1.0CPE matchmatch criteria
cpe:2.3:a:xmlsoft:libxslt:0.1.0:*:*:*:*:*:*:*
0.2.0CPE matchmatch criteria
cpe:2.3:a:xmlsoft:libxslt:0.2.0:*:*:*:*:*:*:*
0.3.0CPE matchmatch criteria
cpe:2.3:a:xmlsoft:libxslt:0.3.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.29%
Probability of exploitation in next 30 days
EPSS Percentile
90.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0429 is in the 87th percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libxslt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libxslt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: mingw32-libxslt

Vendor Advisories (1)

redhatCVE-2012-6139Low

libxslt: two DoS issues fixed in 1.1.28

Oct 2, 2012

References

lists.fedoraproject.org / pipermail/package-announce/2013-April/102065.html
lists.opensuse.org / opensuse-updates/2013-04/msg00020.html
lists.opensuse.org / opensuse-updates/2013-04/msg00028.html
bugzilla.gnome.org / show_bug.cgi
ExploitPatch
bugzilla.gnome.org / show_bug.cgi
Patch
secunia.com / advisories/52745
Vendor Advisory
secunia.com / advisories/52805
Vendor Advisory
secunia.com / advisories/52813
Vendor Advisory
secunia.com / advisories/52884
Vendor Advisory
git.gnome.org / browse/libxslt/commit
Patch
git.gnome.org / browse/libxslt/commit
ExploitPatch
wiki.mageia.org / en/Support/Advisories/MGASA-2013-0107
suse.com / support/update/announcement/2013/suse-su-20131654-1.html
suse.com / support/update/announcement/2013/suse-su-20131656-1.html
debian.org / security/2013/dsa-2654
mandriva.com / security/advisories
securitytracker.com / id/1028338
ubuntu.com / usn/USN-1784-1
xmlsoft.org / XSLT/news.html