No exploitation reportedFix available

CVE-2021-41803

Q: Is CVE-2021-41803 actively exploited?

Active exploitation of CVE-2021-41803 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-41803?

CVE-2021-41803 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H.

No exploitation reported by the sources we read.

Published2022-09-23
Fixed in1.13.2 · 1.12.5 · 1.11.9
WeaknessCWE-862

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

HashiCorp Consul 1.8.1 up to 1.11.8, 1.12.4, and 1.13.1 do not properly validate the node or segment names prior to interpolation and usage in JWT claim assertions with the auto config RPC. Fixed in 1.11.9, 1.12.5, and 1.13.2."

Timeline

dates in UTC

2022-09-2301:15CVE 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-2021-41803?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-41803?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV · NVD

Hashicorp consul

Branch	Affected	Fixed in	Source
1.13	≥ 1.13.1, < 1.13.2	1.13.2	OSV
1.13	≥ 1.13.0, < 1.13.2	1.13.2	OSV
1.12	≥ 1.12.4, < 1.12.5	1.12.5	OSV
1.12	≥ 1.12.0, < 1.12.5	1.12.5	OSV
1.x	≥ 1.8.1, < 1.11.9	1.11.9	NVD · OSV
1.12	= 1.12.4	no fix published	NVD
1.13	= 1.13.1	no fix published	NVD

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

Fix

Update Hashicorp consul to 1.13.2 · 1.12.5 · 1.11.9

Advisories and patches

discuss.hashicorp.comVendor Advisory
www.hashicorp.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2025-05-27
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.12025-05-27
NVDCVSS 3.17.1read 2026-10-23
CISA-ADPweakness (CWE)CWE-8622025-05-27
NVDweakness (CWE)CWE-862read 2026-10-23
FIRST EPSSEPSS score1.1 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Published: 2022-09-23
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-41803?

Is CVE-2021-41803 actively exploited?

Active exploitation of CVE-2021-41803 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-41803?

CVE-2021-41803 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H.

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