How severe is CVE-2021-26069?

CVE-2021-26069 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-26069 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26069?

CVE-2021-26069 primarily affects Atlassian Data Center. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-26069?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-26069 published?

CVE-2021-26069 was published on 2021-03-22 and last updated on 2026-06-17.

CVE-2021-26069

CVE-2021-26069 is a medium-severity vulnerability in Atlassian Data Center with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-74.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Atlassian Data Center
Published: 2021-03-22
Last modified: 2026-06-17

Description

Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote attackers to download temporary files and enumerate project keys via an Information Disclosure vulnerability in the /rest/api/1.0/issues/{id}/ActionsAndOperations API endpoint. The affected versions are before version 8.5.11, from version 8.6.0 before 8.13.3, and from version 8.14.0 before 8.15.0.

Frequently asked questions

What is CVE-2021-26069?: Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote attackers to download temporary files and enumerate project keys via an Information Disclosure vulnerability in the /rest/api/1.0/issues/{id}/ActionsAndOperations API endpoint. The affected versions are before version 8.5.11, from version 8.6.0 before 8.13.3, and from version 8.14.0 before 8.15.0.
How severe is CVE-2021-26069?: CVE-2021-26069 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-26069 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26069?: CVE-2021-26069 primarily affects Atlassian Data Center. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-26069?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26069 published?: CVE-2021-26069 was published on 2021-03-22 and last updated on 2026-06-17.

References

https://jira.atlassian.com/browse/JRASERVER-72010

Affected products (4)

cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*

More vulnerabilities in Atlassian Data Center

CVE-2017-18113 — High (CVSS 8.8): The DefaultOSWorkflowConfigurator class in Jira Server and Jira Data Center before version 8.18.1 allows remote…
CVE-2021-41312 — High (CVSS 7.5): Affected versions of Atlassian Jira Server and Data Center allow a remote attacker who has had their access revoked…
CVE-2021-39123 — High (CVSS 7.5): Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote attackers to impact the…
CVE-2021-39113 — High (CVSS 7.5): Affected versions of Atlassian Jira Server and Data Center allow anonymous remote attackers to continue to view cached…
CVE-2021-43947 — High (CVSS 7.2): Affected versions of Atlassian Jira Server and Data Center allow remote attackers with administrator privileges to…
CVE-2021-26070 — High (CVSS 7.2): Affected versions of Atlassian Jira Server and Data Center allow remote attackers to evade behind-the-firewall…

All CVEs affecting Atlassian Data Center →

Other CWE-74 (Improper Neutralization of Special Elements (Injection)) vulnerabilities

CVE-2026-105135 — Critical (CVSS 10.0): A vulnerability has been found in InternLM MindSearch 0.1.0. This issue affects the function ExecutionAction.run of the…
CVE-2026-61732 — Critical (CVSS 10.0): Decepticon is an autonomous hacking agent for red teams. Versions prior to 1.1.17 wrap web crawl results — the output…
CVE-2026-94097 — Critical (CVSS 10.0): A vulnerability was determined in Netcore NBR200V2 1.3.241127.071246. This affects an unknown part of the file…
CVE-2026-20130 — Critical (CVSS 10.0): As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Identity Services Engine…
CVE-2026-82971 — Critical (CVSS 10.0): A vulnerability was determined in QVidium Opera11 3.3.2a26-Ax4x-opera11. This affects an unknown part of the file…
CVE-2026-54159 — Critical (CVSS 10.0): PrestaShop ps_facetedsearch is a module that adds layered navigation filters. From 3.0.0 until 4.0.4, the…

Browse all CWE-74 (Improper Neutralization of Special Elements (Injection)) vulnerabilities →