bolo-solo up to 2.6.4 SnakeYAML BackupService.java importMarkdownsSync deserialization

Summaryinfo

A vulnerability identified as critical has been detected in bolo-solo up to 2.6.4. Affected is the function importMarkdownsSync of the file src/main/java/org/b3log/solo/bolo/prop/BackupService.java of the component SnakeYAML. Performing a manipulation results in deserialization. This vulnerability is known as CVE-2026-1691. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in bolo-solo up to 2.6.4. This affects the function importMarkdownsSync of the file src/main/java/org/b3log/solo/bolo/prop/BackupService.java of the component SnakeYAML. The manipulation with an unknown input leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-1691. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 7.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔒

CNA Base Score: 6.3
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

01/30/2026 Advisory disclosed
01/30/2026 +0 days VulDB entry created
03/03/2026 +32 days VulDB entry last update

Sourcesinfo

Advisory: 325
Status: Confirmed

CVE: CVE-2026-1691 (🔒)
GCVE (CVE): GCVE-0-2026-1691
GCVE (VulDB): GCVE-100-343485
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/30/2026 09:05
Updated: 03/03/2026 03:28
Changes: 01/30/2026 09:05 (55), 01/31/2026 10:40 (30), 03/03/2026 03:28 (11)
Complete: 🔍
Submitter: MaoQiu
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #741899: bolo-solo V2.6.4 SnakeYAML deserialization vulnerability (by MaoQiu)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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