No exploitation reportedFix available

CVE-2021-26070

Q: Is CVE-2021-26070 actively exploited?

Active exploitation of CVE-2021-26070 has not been confirmed. Its EPSS score was 2.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-26070?

CVE-2021-26070 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

No exploitation reported by the sources we read.

Published2021-03-22
Fixed in8.14.1 · 8.13.3
WeaknessCWE-287

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

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to evade behind-the-firewall protection of app-linked resources via a Broken Authentication vulnerability in the `makeRequest` gadget resource. The affected versions are before version 8.13.3, and from version 8.14.0 before 8.14.1.

Timeline

dates in UTC

2021-03-2205:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 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-2021-26070?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-26070?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Atlassian data center

Branch	Affected	Fixed in	Source
8.14	≥ 8.14.0, < 8.14.1	8.14.1	NVD
8.13	< 8.13.3	8.13.3	NVD

Atlassian jira

Branch	Affected	Fixed in	Source
8.13	< 8.13.3	8.13.3	NVD

Atlassian Jira

Branch	Affected	Fixed in	Source
8.14	≥ 8.14.0, < 8.14.1	8.14.1	NVD

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

Fix

Update Atlassian data center to 8.14.1 · 8.13.3

Advisories and patches

jira.atlassian.comVendor Advisory

Detection

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

Sources

NVDCVSS 3.17.2read 2026-10-23
NVDCVSS 2.06.4read 2026-10-23
NVDweakness (CWE)CWE-287read 2026-10-23
FIRST EPSSEPSS score2.0 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Published: 2021-03-22
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-26070?

Is CVE-2021-26070 actively exploited?

Active exploitation of CVE-2021-26070 has not been confirmed. Its EPSS score was 2.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-26070?

CVE-2021-26070 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

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