CVE-2023-40171

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.8%, top 49% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Dispatch is an open source security incident management tool. The server response includes the JWT Secret Key used for signing JWT tokens in error message when the Dispatch Plugin - Basic Authentication Provider plugin encounters an error when attempting to decode a JWT token. Any Dispatch users who own their instance and rely on the Dispatch Plugin - Basic Authentication Provider plugin for authentication may be impacted, allowing for any account to be taken over within their own instance. This could be done by using the secret to sign attacker crafted JWTs. If you think that you may be impacted, we strongly suggest you to rotate the secret stored in the DISPATCH_JWT_SECRET envvar in the .env file. This issue has been addressed in commit b1942a4319 which has been included in the 20230817 release. users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
72(Attend)
EG Risk 72/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity91% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
51.4%
KEV
Not listed

Published

August 17, 2023

Last Modified

November 21, 2024

Advisory Details (4)

Auto-updated Jul 23, 2026
Patch available. Sources: github, github_commit, github_pr, github_release.
github Patch Available

Server response includes the JWT Secret Key used for signing JWT tokens in error message · Advisory · Netflix/dispatch · GitHub

https://github.com/Netflix/dispatch/security/advisories/GHSA-fv3x-67q3-6pg7
github_release Patch Available

v20241220

Patch available: Netflix/dispatch v20241220

https://github.com/Netflix/dispatch/releases/tag/latest
github_pr Patch Available

Removes error message for malformed JWT tokens

Patch available: Netflix/dispatch v20230817c (PR #3695 merged 2023-08-16)

https://github.com/Netflix/dispatch/pull/3695
github_commit

commit b1942a4319f0 (Netflix/dispatch)

Fix landed in Netflix/dispatch commit b1942a4319f0 — awaiting tagged release

https://github.com/Netflix/dispatch/commit/b1942a4319f0de820d86b84a58ebc85398b97c70

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 51× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 110 total refreshes for this CVE.

  1. 2026-07-23 14:16 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2023-40171?
CVE-2023-40171 is a critical vulnerability published on August 17, 2023. Dispatch is an open source security incident management tool. The server response includes the JWT Secret Key used for signing JWT tokens in error message when the Dispatch Plugin - Basic Authentication Provider plugin encounters an error when attempting to decode a JWT token. Any Dispatch users…
When was CVE-2023-40171 disclosed?
CVE-2023-40171 was first published in the National Vulnerability Database on August 17, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-40171 actively exploited?
CVE-2023-40171 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 51.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-40171?
CVE-2023-40171 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2023-40171?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-40171, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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