How severe is CVE-2026-49233?

CVE-2026-49233 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-49233 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-2026-49233?

CVE-2026-49233 affects Nlnetlabs Routinator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-49233?

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-2026-49233 have an EU (EUVD) identifier?

Yes. CVE-2026-49233 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35063.

When was CVE-2026-49233 published?

CVE-2026-49233 was published on 2026-06-08 and last updated on 2026-07-23.

CVE-2026-49233

CVE-2026-49233 is a high-severity vulnerability in Nlnetlabs Routinator with a CVSS 3.x base score of 7.5. 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-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.3
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35063
Weakness: CWE-22
Affected product: Nlnetlabs Routinator
Published: 2026-06-08
Last modified: 2026-07-23

Description

Routinator does not properly check the module component of rsync URIs, which are used to create the file system paths for the Routinator cache. This allows for path traversal by having a module name containing .., potentially providing an attacker access to the entire Routinator rsync cache.

Frequently asked questions

What is CVE-2026-49233?: Routinator does not properly check the module component of rsync URIs, which are used to create the file system paths for the Routinator cache. This allows for path traversal by having a module name containing .., potentially providing an attacker access to the entire Routinator rsync cache.
How severe is CVE-2026-49233?: CVE-2026-49233 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-49233 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-2026-49233?: CVE-2026-49233 affects Nlnetlabs Routinator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-49233?: 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-2026-49233 have an EU (EUVD) identifier?: Yes. CVE-2026-49233 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35063.
When was CVE-2026-49233 published?: CVE-2026-49233 was published on 2026-06-08 and last updated on 2026-07-23.

References

https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-49233.txt

Affected products (1)

cpe:2.3:a:nlnetlabs:routinator:*:*:*:*:*:*:*:*

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