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No exploitation reportedFix available

CVE-2018-8023

No exploitation reported by the sources we read.

  • Published2018-09-21
  • Fixed in1.6.1 · 1.5.2 · 1.4.2
  • WeaknessCWE-200

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2018-09-2113:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-8023?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-8023?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV · NVD
Apache mesos
BranchAffectedFixed in
1.6≥ 1.6.0, < 1.6.11.6.1
1.5≥ 1.5.0, < 1.5.21.5.2
1.4< 1.4.21.4.2
1.5= 1.5.0no fix published
1.5= 1.5.1no fix published
1.6= 1.6.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Apache mesos to 1.6.1 · 1.5.2 · 1.4.2

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.05.9read 2026-10-23
  • NVDCVSS 2.04.3read 2026-10-23
  • NVDweakness (CWE)CWE-200read 2026-10-23
  • FIRST EPSSEPSS score3.1 %2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2018-09-21
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2018-8023?

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.

Is CVE-2018-8023 actively exploited?

Active exploitation of CVE-2018-8023 has not been confirmed. Its EPSS score was 3.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-8023?

CVE-2018-8023 has a CVSS v3 base score of 5.9 (MEDIUM severity), with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

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