How severe is CVE-2020-35678?

CVE-2020-35678 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-35678 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35678?

CVE-2020-35678 affects Crossbar Autobahn. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35678?

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

When was CVE-2020-35678 published?

CVE-2020-35678 was published on 2020-12-27 and last updated on 2026-06-17.

CVE-2020-35678

CVE-2020-35678 is a medium-severity vulnerability in Crossbar Autobahn with a CVSS 3.x base score of 6.1. 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-601.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 5.8
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-601
Affected product: Crossbar Autobahn
Published: 2020-12-27
Last modified: 2026-06-17

Description

Autobahn|Python before 20.12.3 allows redirect header injection.

Frequently asked questions

What is CVE-2020-35678?: Autobahn|Python before 20.12.3 allows redirect header injection.
How severe is CVE-2020-35678?: CVE-2020-35678 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-35678 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35678?: CVE-2020-35678 affects Crossbar Autobahn. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35678?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-35678 published?: CVE-2020-35678 was published on 2020-12-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:crossbar:autobahn:*:*:*:*:*:*:*:*

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