How severe is CVE-2012-1147?

CVE-2012-1147 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2012-1147 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-1147?

CVE-2012-1147 primarily affects Libexpat Project Libexpat. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-1147?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2012-1147 published?

CVE-2012-1147 was published on 2012-07-03 and last updated on 2026-06-16.

CVE-2012-1147

CVE-2012-1147 is a medium-severity vulnerability in Libexpat Project Libexpat with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Libexpat Project Libexpat
Published: 2012-07-03
Last modified: 2026-06-16

Description

readfilemap.c in expat before 2.1.0 allows context-dependent attackers to cause a denial of service (file descriptor consumption) via a large number of crafted XML files.

Frequently asked questions

What is CVE-2012-1147?: readfilemap.c in expat before 2.1.0 allows context-dependent attackers to cause a denial of service (file descriptor consumption) via a large number of crafted XML files.
How severe is CVE-2012-1147?: CVE-2012-1147 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2012-1147 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-1147?: CVE-2012-1147 primarily affects Libexpat Project Libexpat. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-1147?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-1147 published?: CVE-2012-1147 was published on 2012-07-03 and last updated on 2026-06-16.

References

Affected products (11)

cpe:2.3:o:apple:mac_os_x:10.11.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.11.1:*:*:*:*:*:*:*
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
cpe:2.3:a:libexpat_project:libexpat:1.95.1:*:*:*:*:*:*:*
cpe:2.3:a:libexpat_project:libexpat:1.95.2:*:*:*:*:*:*:*
cpe:2.3:a:libexpat_project:libexpat:1.95.4:*:*:*:*:*:*:*
cpe:2.3:a:libexpat_project:libexpat:1.95.5:*:*:*:*:*:*:*
cpe:2.3:a:libexpat_project:libexpat:1.95.6:*:*:*:*:*:*:*
cpe:2.3:a:libexpat_project:libexpat:1.95.7:*:*:*:*:*:*:*
cpe:2.3:a:libexpat_project:libexpat:1.95.8:*:*:*:*:*:*:*
cpe:2.3:a:libexpat_project:libexpat:2.0.0:*:*:*:*:*:*:*

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