How severe is CVE-2016-8218?

CVE-2016-8218 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-8218 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-8218?

CVE-2016-8218 primarily affects Cloudfoundry Cf-release. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-8218?

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

When was CVE-2016-8218 published?

CVE-2016-8218 was published on 2017-06-13 and last updated on 2026-06-17.

CVE-2016-8218

CVE-2016-8218 is a critical-severity vulnerability in Cloudfoundry Cf-release with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cloudfoundry Cf-release
Published: 2017-06-13
Last modified: 2026-06-17

Description

An issue was discovered in Cloud Foundry Foundation routing-release versions prior to 0.142.0 and cf-release versions 203 to 231. Incomplete validation logic in JSON Web Token (JWT) libraries can allow unprivileged attackers to impersonate other users to the routing API, aka an "Unauthenticated JWT signing algorithm in routing" issue.

Frequently asked questions

What is CVE-2016-8218?: An issue was discovered in Cloud Foundry Foundation routing-release versions prior to 0.142.0 and cf-release versions 203 to 231. Incomplete validation logic in JSON Web Token (JWT) libraries can allow unprivileged attackers to impersonate other users to the routing API, aka an "Unauthenticated JWT signing algorithm in routing" issue.
How severe is CVE-2016-8218?: CVE-2016-8218 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-8218 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-8218?: CVE-2016-8218 primarily affects Cloudfoundry Cf-release. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-8218?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2016-8218 published?: CVE-2016-8218 was published on 2017-06-13 and last updated on 2026-06-17.

References

https://www.cloudfoundry.org/cve-2016-8218/

Affected products (29)

cpe:2.3:a:cloudfoundry:cf-release:*:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:204:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:205:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:206:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:207:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:208:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:209:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:210:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:211:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:212:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:213:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:214:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:215:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:217:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:218:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:219:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:220:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:221:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:222:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:223:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:224:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:225:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:226:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:227:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:228:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:229:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:230:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-release:231:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:routing-release:*:*:*:*:*:*:*:*

More vulnerabilities in Cloudfoundry Cf-release

CVE-2015-5172 — Critical (CVSS 9.8): Cloud Foundry Runtime cf-release before 216, UAA before 2.5.2, and Pivotal Cloud Foundry (PCF) Elastic Runtime before…
CVE-2015-5171 — Critical (CVSS 9.8): The password change functionality in Cloud Foundry Runtime cf-release before 216, UAA before 2.5.2, and Pivotal Cloud…
CVE-2017-4992 — Critical (CVSS 9.8): An issue was discovered in Cloud Foundry Foundation cf-release versions prior to v261; UAA release 2.x versions prior…
CVE-2016-6655 — Critical (CVSS 9.8): An issue was discovered in Cloud Foundry Foundation Cloud Foundry release versions prior to v245 and cf-mysql-release…
CVE-2016-6658 — Critical (CVSS 9.6): Applications in cf-release before 245 can be configured and pushed with a user-provided custom buildpack using a URL…
CVE-2018-1195 — High (CVSS 8.8): In Cloud Controller versions prior to 1.46.0, cf-deployment versions prior to 1.3.0, and cf-release versions prior to…

All CVEs affecting Cloudfoundry Cf-release →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →