How severe is CVE-2020-26945?

CVE-2020-26945 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-26945 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26945?

CVE-2020-26945 affects Mybatis. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26945?

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.

When was CVE-2020-26945 published?

CVE-2020-26945 was published on 2020-10-10 and last updated on 2026-06-17.

CVE-2020-26945

CVE-2020-26945 is a high-severity vulnerability in Mybatis with a CVSS 3.x base score of 8.1. 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-502.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 5.1
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Mybatis
Published: 2020-10-10
Last modified: 2026-06-17

Description

MyBatis before 3.5.6 mishandles deserialization of object streams.

Frequently asked questions

What is CVE-2020-26945?: MyBatis before 3.5.6 mishandles deserialization of object streams.
How severe is CVE-2020-26945?: CVE-2020-26945 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-26945 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26945?: CVE-2020-26945 affects Mybatis. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26945?: 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.
When was CVE-2020-26945 published?: CVE-2020-26945 was published on 2020-10-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mybatis:mybatis:*:*:*:*:*:*:*:*

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