CVE-2026-1691
bolo-solo SnakeYAML BackupService.java importMarkdownsSync deserialization
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.
INFO
Published Date :
Jan. 30, 2026, 5:16 p.m.
Last Modified :
March 3, 2026, 1:09 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update the SnakeYAML library to the latest secure version.
- Review and sanitize all deserialized data.
- Avoid deserializing untrusted data sources.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-1691.
| URL | Resource |
|---|---|
| https://github.com/bolo-blog/bolo-solo/issues/325 | Exploit Issue Tracking Vendor Advisory |
| https://github.com/bolo-blog/bolo-solo/issues/325#issue-3828755519 | Exploit Issue Tracking Vendor Advisory |
| https://vuldb.com/?ctiid.343485 | Permissions Required VDB Entry |
| https://vuldb.com/?id.343485 | Third Party Advisory VDB Entry |
| https://vuldb.com/?submit.741899 | Third Party Advisory VDB Entry |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-1691 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-1691
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-1691 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-1691 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 03, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-502 Added CPE Configuration OR *cpe:2.3:a:adlered:bolo-solo:*:*:*:*:*:*:*:* versions up to (including) 2.6.4 Added Reference Type VulDB: https://github.com/bolo-blog/bolo-solo/issues/325 Types: Exploit, Issue Tracking, Vendor Advisory Added Reference Type VulDB: https://github.com/bolo-blog/bolo-solo/issues/325#issue-3828755519 Types: Exploit, Issue Tracking, Vendor Advisory Added Reference Type VulDB: https://vuldb.com/?ctiid.343485 Types: Permissions Required, VDB Entry Added Reference Type VulDB: https://vuldb.com/?id.343485 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/?submit.741899 Types: Third Party Advisory, VDB Entry -
New CVE Received by [email protected]
Jan. 30, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Added CVSS V2 (AV:N/AC:L/Au:S/C:P/I:P/A:P) Added CWE CWE-20 Added CWE CWE-502 Added Reference https://github.com/bolo-blog/bolo-solo/issues/325 Added Reference https://github.com/bolo-blog/bolo-solo/issues/325#issue-3828755519 Added Reference https://vuldb.com/?ctiid.343485 Added Reference https://vuldb.com/?id.343485 Added Reference https://vuldb.com/?submit.741899