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MEDIUM severity

CVE-2018-8023 — mesos

MEDIUM

CVE-2018-8023 is a medium-severity (CVSS 5.9) Information Exposure vulnerability in org.apache.mesos:mesos. A fix is available for org.apache.mesos:mesos — see the affected versions and patch details below.

Moderate severity vulnerability that affects org.apache.mesos:mesos

Also known asGHSA-c8cc-p3j7-4c7f
Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
3.1%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs88th percentile — riskier than 88% of all scored CVEsHighest risk
0.10%1.31%2.53%3.74%0.8%3.1%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

3 pkgs affected
☕org.apache.mesos:mesos☕org.apache.mesos:mesos☕org.apache.mesos:mesos

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Apache Mesos can be configured to require authentication to call the Executor HTTP API using JSON Web Token (JWT). In Apache Mesos versions pre-1.4.2, 1.5.0, 1.5.1, 1.6.0 the comparison of the generated HMAC value against the provided signature in the JWT implementation used is vulnerable to a timing attack because instead of a constant-time string comparison routine a standard == operator has been used. A malicious actor can therefore abuse the timing difference of when the JWT validation function returns to reveal the correct HMAC value.

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.apache.mesos:mesosall versions1.4.2org.apache.mesos:mesos:1.4.2
☕Mavenorg.apache.mesos:mesos≥ 1.5.0&&< 1.5.21.5.2org.apache.mesos:mesos:1.5.2
☕Mavenorg.apache.mesos:mesos≥ 1.6.0&&< 1.6.11.6.1org.apache.mesos:mesos:1.6.1

Affected Products

1 product · 4 configurations
Application
mesosapache
< 1.4.2
3 versions
1.5.01.5.11.6.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.mesos:mesos, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.apache.mesos:mesos to 1.4.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-8023 is resolved across your whole dependency graph.

  3. Workarounds

    Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them.

Frequently Asked Questions

Apache Mesos can be configured to require authentication to call the Executor HTTP API using JSON Web Token (JWT). In Apache Mesos versions pre-1.4.2, 1.5.0, 1.5.1, 1.6.0 the comparison of the generated HMAC value against the provided signature in the JWT implementation used is vulnerable to a timing attack because instead of a constant-time string comparison routine a standard `==` operator has been used. A malicious actor can therefore abuse the timing difference of when the JWT validation function returns to reveal the correct HMAC value.
O3 Security · Impact-Aware SCA

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CVE-2018-8023: mesos — Fixed in 1.4.2