Skip to content
Noroxi
CVE-2012-6139· NVD / CVE Program· CNA redhat

libxslt before 1.1.28 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an (1) empty match attri

libxslt before 1.1.28 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an (1) empty match attribute in a XSL key to the xsltAddKey function in keys.c or (2) uninitialized variable to the xsltDocumentFunction function in functions.c.

MediumCVSS 5.0 · v2.0—No exploit Fix available
Published
Apr 12, 2013
Updated
Jun 16, 2026
EPSS
4.3% · 91th percentile
CWE
—
Follow this CVE

Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
20 / 40 · 5.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 4.3%

Affected systems

VendorProduct
xmlsoftlibxslt
opensuseopensuse

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • opensuse opensuse11.4
  • opensuse opensuse12.1
  • opensuse opensuse12.2
  • opensuse opensuse12.3
  • xmlsoft libxsltup to 1.1.27 inclusive
  • xmlsoft libxslt0.0.1
  • xmlsoft libxslt0.1.0
  • xmlsoft libxslt0.10.0
  • xmlsoft libxslt0.11.0
  • xmlsoft libxslt0.12.0
  • xmlsoft libxslt0.13.0
  • xmlsoft libxslt0.14.0
  • xmlsoft libxslt0.2.0
  • xmlsoft libxslt0.3.0
  • xmlsoft libxslt0.4.0
  • xmlsoft libxslt0.5.0
  • xmlsoft libxslt0.6.0
  • xmlsoft libxslt0.7.0
  • xmlsoft libxslt0.8.0
  • xmlsoft libxslt0.9.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12libxsltbefore 1.1.26-14.11.1.26-14.1
Debian:6.0libxsltbefore 1.1.26-6+squeeze31.1.26-6+squeeze3

Same product

xmlsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-11068libxslt through 1.1.33 allows bypass of a protection mechanism because callers of xsltCheckRead and xsltCheckWrite permit access even upon r
    41Plan
  • CVE-2008-2935Multiple heap-based buffer overflows in the rc4 (1) encryption (aka exsltCryptoRc4EncryptFunction) and (2) decryption (aka exsltCryptoRc4Dec
    34Monitor
  • CVE-2025-24855numbers.c in libxslt before 1.1.43 has a use-after-free because, in nested XPath evaluations, an XPath context node can be modified but neve
    31Monitor
  • CVE-2024-55549xsltGetInheritedNsList in libxslt before 1.1.43 has a use-after-free issue related to exclusion of result prefixes.
    31Monitor
  • CVE-2019-5815Type confusion in xsltNumberFormatGetMultipleLevel prior to libxslt 1.1.33 could allow attackers to potentially exploit heap corruption via
    31Monitor
  • CVE-2019-18197In xsltCopyText in transform.c in libxslt 1.1.33, a pointer variable isn't reset under certain circumstances.
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:libxslt1.1.26-14.1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
P · the service can be disrupted
Attack complexity
Low
Confidentiality impact
None
Integrity impact
None
Availability impact
P

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records