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.

Published: 2017-06-13 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-8218 is rated Moderate Risk (61.8/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.58%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-8218

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 1.22% 0.58% -0.63%
2 2025-03-29 0.58% 1.22% +0.63%
3 2025-03-17 — 0.58% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-8218

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2016-8218

Affected software / configurations for CVE-2016-8218

Vendor Product Version Raw CPE
cloudfoundry cf-release <= 203 cpe:2.3:a:cloudfoundry:cf-release:*:*:*:*:*:*:*:*
cloudfoundry cf-release 204 cpe:2.3:a:cloudfoundry:cf-release:204:*:*:*:*:*:*:*
cloudfoundry cf-release 205 cpe:2.3:a:cloudfoundry:cf-release:205:*:*:*:*:*:*:*
cloudfoundry cf-release 206 cpe:2.3:a:cloudfoundry:cf-release:206:*:*:*:*:*:*:*
cloudfoundry cf-release 207 cpe:2.3:a:cloudfoundry:cf-release:207:*:*:*:*:*:*:*
cloudfoundry cf-release 208 cpe:2.3:a:cloudfoundry:cf-release:208:*:*:*:*:*:*:*
cloudfoundry cf-release 209 cpe:2.3:a:cloudfoundry:cf-release:209:*:*:*:*:*:*:*
cloudfoundry cf-release 210 cpe:2.3:a:cloudfoundry:cf-release:210:*:*:*:*:*:*:*
cloudfoundry cf-release 211 cpe:2.3:a:cloudfoundry:cf-release:211:*:*:*:*:*:*:*
cloudfoundry cf-release 212 cpe:2.3:a:cloudfoundry:cf-release:212:*:*:*:*:*:*:*
cloudfoundry cf-release 213 cpe:2.3:a:cloudfoundry:cf-release:213:*:*:*:*:*:*:*
cloudfoundry cf-release 214 cpe:2.3:a:cloudfoundry:cf-release:214:*:*:*:*:*:*:*
cloudfoundry cf-release 215 cpe:2.3:a:cloudfoundry:cf-release:215:*:*:*:*:*:*:*
cloudfoundry cf-release 217 cpe:2.3:a:cloudfoundry:cf-release:217:*:*:*:*:*:*:*
cloudfoundry cf-release 218 cpe:2.3:a:cloudfoundry:cf-release:218:*:*:*:*:*:*:*
cloudfoundry cf-release 219 cpe:2.3:a:cloudfoundry:cf-release:219:*:*:*:*:*:*:*
cloudfoundry cf-release 220 cpe:2.3:a:cloudfoundry:cf-release:220:*:*:*:*:*:*:*
cloudfoundry cf-release 221 cpe:2.3:a:cloudfoundry:cf-release:221:*:*:*:*:*:*:*
cloudfoundry cf-release 222 cpe:2.3:a:cloudfoundry:cf-release:222:*:*:*:*:*:*:*
cloudfoundry cf-release 223 cpe:2.3:a:cloudfoundry:cf-release:223:*:*:*:*:*:*:*
cloudfoundry cf-release 224 cpe:2.3:a:cloudfoundry:cf-release:224:*:*:*:*:*:*:*
cloudfoundry cf-release 225 cpe:2.3:a:cloudfoundry:cf-release:225:*:*:*:*:*:*:*
cloudfoundry cf-release 226 cpe:2.3:a:cloudfoundry:cf-release:226:*:*:*:*:*:*:*
cloudfoundry cf-release 227 cpe:2.3:a:cloudfoundry:cf-release:227:*:*:*:*:*:*:*
cloudfoundry cf-release 228 cpe:2.3:a:cloudfoundry:cf-release:228:*:*:*:*:*:*:*
cloudfoundry cf-release 229 cpe:2.3:a:cloudfoundry:cf-release:229:*:*:*:*:*:*:*
cloudfoundry cf-release 230 cpe:2.3:a:cloudfoundry:cf-release:230:*:*:*:*:*:*:*
cloudfoundry cf-release 231 cpe:2.3:a:cloudfoundry:cf-release:231:*:*:*:*:*:*:*
cloudfoundry routing-release <= 0.141.0 cpe:2.3:a:cloudfoundry:routing-release:*:*:*:*:*:*:*:*

References for CVE-2016-8218

URL Tags
https://www.cloudfoundry.org/cve-2016-8218/ Patch Vendor Advisory
cvelogic Threat Intelligence