How severe is CVE-2021-26067?

CVE-2021-26067 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-2021-26067 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26067?

CVE-2021-26067 affects Atlassian Bamboo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26067?

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

When was CVE-2021-26067 published?

CVE-2021-26067 was published on 2021-01-28 and last updated on 2026-06-17.

CVE-2021-26067

CVE-2021-26067 is a medium-severity vulnerability in Atlassian Bamboo 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Atlassian Bamboo
Published: 2021-01-28
Last modified: 2026-06-17

Description

Affected versions of Atlassian Bamboo allow an unauthenticated remote attacker to view a stack trace that may reveal the path for the home directory in disk and if certain files exists on the tmp directory, via a Sensitive Data Exposure vulnerability in the /chart endpoint. The affected versions are before version 7.2.2.

Frequently asked questions

What is CVE-2021-26067?: Affected versions of Atlassian Bamboo allow an unauthenticated remote attacker to view a stack trace that may reveal the path for the home directory in disk and if certain files exists on the tmp directory, via a Sensitive Data Exposure vulnerability in the /chart endpoint. The affected versions are before version 7.2.2.
How severe is CVE-2021-26067?: CVE-2021-26067 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-2021-26067 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26067?: CVE-2021-26067 affects Atlassian Bamboo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26067?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26067 published?: CVE-2021-26067 was published on 2021-01-28 and last updated on 2026-06-17.

References

https://jira.atlassian.com/browse/BAM-21215

Affected products (1)

cpe:2.3:a:atlassian:bamboo:*:*:*:*:*:*:*:*

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