How severe is CVE-2024-32657?

CVE-2024-32657 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2024-32657 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-32657?

CVE-2024-32657 affects Nixos Hydra. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-32657?

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

Does CVE-2024-32657 have an EU (EUVD) identifier?

Yes. CVE-2024-32657 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-30448.

When was CVE-2024-32657 published?

CVE-2024-32657 was published on 2024-04-22 and last updated on 2026-06-17.

CVE-2024-32657

CVE-2024-32657 is a medium-severity vulnerability in Nixos Hydra with a CVSS 3.x base score of 4.6. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.6)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-30448
Weakness: CWE-79
Affected product: Nixos Hydra
Published: 2024-04-22
Last modified: 2026-06-17

Description

Hydra is a Continuous Integration service for Nix based projects. Attackers can execute arbitrary code in the browser context of Hydra and execute authenticated HTTP requests. The abused feature allows Nix builds to specify files that Hydra serves to clients. One use of this functionality is serving NixOS `.iso` files. The issue is only with html files served by Hydra. The issue has been patched on https://hydra.nixos.org around 2024-04-21 14:30 UTC. The nixpkgs package were fixed in unstable and 23.11. Users with custom Hydra packages can apply the fix commit to their local installations. The vulnerability is only triggered when opening HTML build artifacts, so not opening them until the vulnerability is fixed works around the issue.

Frequently asked questions

What is CVE-2024-32657?: Hydra is a Continuous Integration service for Nix based projects. Attackers can execute arbitrary code in the browser context of Hydra and execute authenticated HTTP requests. The abused feature allows Nix builds to specify files that Hydra serves to clients. One use of this functionality is serving NixOS `.iso` files. The issue is only with html files served by Hydra. The issue has been patched on https://hydra.nixos.org around 2024-04-21 14:30 UTC. The nixpkgs package were fixed in unstable and 23.11. Users with custom Hydra packages can apply the fix commit to their local installations. The vulnerability is only triggered when opening HTML build artifacts, so not opening them until the vulnerability is fixed works around the issue.
How severe is CVE-2024-32657?: CVE-2024-32657 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2024-32657 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-32657?: CVE-2024-32657 affects Nixos Hydra. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-32657?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-32657 have an EU (EUVD) identifier?: Yes. CVE-2024-32657 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-30448.
When was CVE-2024-32657 published?: CVE-2024-32657 was published on 2024-04-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nixos:hydra:*:*:*:*:*:*:*:*

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