How severe is CVE-2025-48879?

CVE-2025-48879 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-48879 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-48879?

CVE-2025-48879 affects Octoprint. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-48879?

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

Does CVE-2025-48879 have an EU (EUVD) identifier?

Yes. CVE-2025-48879 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-17675.

When was CVE-2025-48879 published?

CVE-2025-48879 was published on 2025-06-10 and last updated on 2026-06-17.

CVE-2025-48879

CVE-2025-48879 is a medium-severity vulnerability in Octoprint with a CVSS 3.x base score of 6.5. 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-140.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-17675
Weakness: CWE-140
Affected product: Octoprint
Published: 2025-06-10
Last modified: 2026-06-17

Description

OctoPrint versions up until and including 1.11.1 contain a vulnerability that allows any unauthenticated attacker to send a manipulated broken multipart/form-data request to OctoPrint and through that make the web server component become unresponsive. The issue can be triggered by a broken multipart/form-data request lacking an end boundary to any of OctoPrint's endpoints implemented through the octoprint.server.util.tornado.UploadStorageFallbackHandler request handler. The request handler will get stuck in an endless busy loop, looking for a part of the request that will never come. As Tornado is single-threaded, that will effectively block the whole web server. The vulnerability has been patched in version 1.11.2.

Frequently asked questions

What is CVE-2025-48879?: OctoPrint versions up until and including 1.11.1 contain a vulnerability that allows any unauthenticated attacker to send a manipulated broken multipart/form-data request to OctoPrint and through that make the web server component become unresponsive. The issue can be triggered by a broken multipart/form-data request lacking an end boundary to any of OctoPrint's endpoints implemented through the octoprint.server.util.tornado.UploadStorageFallbackHandler request handler. The request handler will get stuck in an endless busy loop, looking for a part of the request that will never come. As Tornado is single-threaded, that will effectively block the whole web server. The vulnerability has been patched in version 1.11.2.
How severe is CVE-2025-48879?: CVE-2025-48879 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-48879 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-48879?: CVE-2025-48879 affects Octoprint. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-48879?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-48879 have an EU (EUVD) identifier?: Yes. CVE-2025-48879 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-17675.
When was CVE-2025-48879 published?: CVE-2025-48879 was published on 2025-06-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:octoprint:octoprint:*:*:*:*:*:*:*:*

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