How severe is CVE-2017-5660?

CVE-2017-5660 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2017-5660 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-5660?

CVE-2017-5660 primarily affects Apache Traffic Server. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-5660?

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-2017-5660 published?

CVE-2017-5660 was published on 2018-02-27 and last updated on 2026-06-17.

CVE-2017-5660

CVE-2017-5660 is a high-severity vulnerability in Apache Traffic Server with a CVSS 3.x base score of 8.6. 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: High (CVSS 3.x base score 8.6)
CVSS v2: 5.0
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apache Traffic Server
Published: 2018-02-27
Last modified: 2026-06-17

Description

There is a vulnerability in Apache Traffic Server (ATS) 6.2.0 and prior and 7.0.0 and prior with the Host header and line folding. This can have issues when interacting with upstream proxies and the wrong host being used.

Frequently asked questions

What is CVE-2017-5660?: There is a vulnerability in Apache Traffic Server (ATS) 6.2.0 and prior and 7.0.0 and prior with the Host header and line folding. This can have issues when interacting with upstream proxies and the wrong host being used.
How severe is CVE-2017-5660?: CVE-2017-5660 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2017-5660 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-5660?: CVE-2017-5660 primarily affects Apache Traffic Server. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-5660?: 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-2017-5660 published?: CVE-2017-5660 was published on 2018-02-27 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:traffic_server:6.2.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:traffic_server:6.2.1:rc0:*:*:*:*:*:*
cpe:2.3:a:apache:traffic_server:6.2.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:traffic_server:6.2.2:rc0:*:*:*:*:*:*
cpe:2.3:a:apache:traffic_server:7.0.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:traffic_server:7.0.0:rc0:*:*:*:*:*:*
cpe:2.3:a:apache:traffic_server:7.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:apache:traffic_server:7.0.0:rc2:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

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