How severe is CVE-2016-8739?

CVE-2016-8739 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2016-8739 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-8739?

CVE-2016-8739 primarily affects Apache Cxf. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-8739?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-8739 published?

CVE-2016-8739 was published on 2017-08-10 and last updated on 2026-06-17.

CVE-2016-8739

CVE-2016-8739 is a high-severity vulnerability in Apache Cxf with a CVSS 3.x base score of 7.5. 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-611.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 7% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Apache Cxf
Published: 2017-08-10
Last modified: 2026-06-17

Description

The JAX-RS module in Apache CXF prior to 3.0.12 and 3.1.x prior to 3.1.9 provides a number of Atom JAX-RS MessageBodyReaders. These readers use Apache Abdera Parser which expands XML entities by default which represents a major XXE risk.

Frequently asked questions

What is CVE-2016-8739?: The JAX-RS module in Apache CXF prior to 3.0.12 and 3.1.x prior to 3.1.9 provides a number of Atom JAX-RS MessageBodyReaders. These readers use Apache Abdera Parser which expands XML entities by default which represents a major XXE risk.
How severe is CVE-2016-8739?: CVE-2016-8739 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2016-8739 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-8739?: CVE-2016-8739 primarily affects Apache Cxf. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-8739?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-8739 published?: CVE-2016-8739 was published on 2017-08-10 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:cxf:3.1.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:cxf:3.1.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:cxf:3.1.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:cxf:3.1.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:cxf:3.1.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:cxf:3.1.5:*:*:*:*:*:*:*
cpe:2.3:a:apache:cxf:3.1.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:cxf:3.1.7:*:*:*:*:*:*:*
cpe:2.3:a:apache:cxf:3.1.8:*:*:*:*:*:*:*

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