High severity · published Jan 30, 2026
CVE-2026-1691
bolo-solo SnakeYAML BackupService.java importMarkdownsSync deserialization
8.8
CVSS
0.6%
EPSS
No
On KEV
Description
A vulnerability has been found in bolo-solo up to 2.6.4. This impacts the function importMarkdownsSync of the file src/main/java/org/b3log/solo/bolo/prop/BackupService.java of the component SnakeYAML. Such manipulation leads to deserialization. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BO
bolo-solo ·
2.6.0; 2.6.1; 2.6.2; 2.6.3; 2.6.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1691
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-1691
Exploit
https://github.com/bolo-blog/bolo-solo/issues/325
Exploit
https://github.com/bolo-blog/bolo-solo/issues/325#issue-3828755519
Permissions Required
https://vuldb.com/?ctiid.343485
Third Party Advisory
https://vuldb.com/?id.343485
Third Party Advisory
https://vuldb.com/?submit.741899
