How severe is CVE-2026-24843?

CVE-2026-24843 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-24843 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-24843?

CVE-2026-24843 affects Chainguard Melange. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-24843?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-24843 have an EU (EUVD) identifier?

Yes. CVE-2026-24843 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5373.

When was CVE-2026-24843 published?

CVE-2026-24843 was published on 2026-02-04 and last updated on 2026-06-17.

CVE-2026-24843

CVE-2026-24843 is a high-severity vulnerability in Chainguard Melange with a CVSS 3.x base score of 8.2. 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-22.

Key facts

Severity: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5373
Weakness: CWE-22
Affected product: Chainguard Melange
Published: 2026-02-04
Last modified: 2026-06-17

Description

melange allows users to build apk packages using declarative pipelines. In version 0.11.3 to before 0.40.3, an attacker who can influence the tar stream from a QEMU guest VM could write files outside the intended workspace directory on the host. The retrieveWorkspace function extracts tar entries without validating that paths stay within the workspace, allowing path traversal via ../ sequences. This issue has been patched in version 0.40.3.

Frequently asked questions

What is CVE-2026-24843?: melange allows users to build apk packages using declarative pipelines. In version 0.11.3 to before 0.40.3, an attacker who can influence the tar stream from a QEMU guest VM could write files outside the intended workspace directory on the host. The retrieveWorkspace function extracts tar entries without validating that paths stay within the workspace, allowing path traversal via ../ sequences. This issue has been patched in version 0.40.3.
How severe is CVE-2026-24843?: CVE-2026-24843 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-24843 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-24843?: CVE-2026-24843 affects Chainguard Melange. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-24843?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-24843 have an EU (EUVD) identifier?: Yes. CVE-2026-24843 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5373.
When was CVE-2026-24843 published?: CVE-2026-24843 was published on 2026-02-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:chainguard:melange:*:*:*:*:*:go:*:*

More vulnerabilities in Chainguard Melange

CVE-2026-24844 — High (CVSS 7.9): melange allows users to build apk packages using declarative pipelines. From version 0.3.0 to before 0.40.3, an…
CVE-2026-25143 — High (CVSS 7.8): melange allows users to build apk packages using declarative pipelines. From version 0.10.0 to before 0.40.3, an…
CVE-2026-29050 — Medium (CVSS 6.1): melange allows users to build apk packages using declarative pipelines. Starting in version 0.32.0 and prior to version…
CVE-2026-25145 — Medium (CVSS 5.5): melange allows users to build apk packages using declarative pipelines. From version 0.14.0 to before 0.40.3, an…
CVE-2026-29051 — Medium (CVSS 4.4): melange allows users to build apk packages using declarative pipelines. Starting in version 0.32.0 and prior to version…
CVE-2026-29049 — Medium (CVSS 4.3): melange allows users to build apk packages using declarative pipelines. In version 0.40.5 and prior, melange…

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