How severe is CVE-2020-35453?

CVE-2020-35453 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2020-35453 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35453?

CVE-2020-35453 primarily affects Hashicorp Vault. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-35453?

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

When was CVE-2020-35453 published?

CVE-2020-35453 was published on 2020-12-17 and last updated on 2026-06-17.

CVE-2020-35453

CVE-2020-35453 is a medium-severity vulnerability in Hashicorp Vault with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Hashicorp Vault
Published: 2020-12-17
Last modified: 2026-06-17

Description

HashiCorp Vault Enterprise’s Sentinel EGP policy feature incorrectly allowed requests to be processed in parent and sibling namespaces. Fixed in 1.5.6 and 1.6.1.

Frequently asked questions

What is CVE-2020-35453?: HashiCorp Vault Enterprise’s Sentinel EGP policy feature incorrectly allowed requests to be processed in parent and sibling namespaces. Fixed in 1.5.6 and 1.6.1.
How severe is CVE-2020-35453?: CVE-2020-35453 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2020-35453 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35453?: CVE-2020-35453 primarily affects Hashicorp Vault. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-35453?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-35453 published?: CVE-2020-35453 was published on 2020-12-17 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:*
cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*

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