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Fencer Vulns
high 8.1

CVE-2020-26945 json

"Deserialization errors in MyBatis"

published 2020-10-10 6 y ago modified 2026-06-17 4 mo ago also GHSA-qq48-m4jx-xqh8 , EUVD-2021-0863

cvss
8.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

MyBatis before 3.5.6 mishandles deserialization of object streams.

Patch / fix

  • maven org.mybatis:mybatis 3.5.6
  • mybatis mybatis 3.5.6
  • mybatis openSUSE Tumbleweed 3.5.6-1.6

opensuse advisories openSUSE-SU-2024:11070-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-26945 updated cvss 7.3

mybatis: mishandles deserialization of object streams which could result in remote code execution

  • Red Hat JBoss Fuse 6 mybatis
    affected: no fix planned “Out of support scope”
  • Red Hat Fuse 7.9
    fixed: vendor fix RHSA-2021:3140
  • Red Hat Integration Camel K 1 mybatis
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.82% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P
GitHub 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.mybatis:mybatis
<3.5.6
3.5.6

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.