GHSA-mwm8-39rw-8826

Source

https://github.com/advisories/GHSA-mwm8-39rw-8826

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mwm8-39rw-8826/GHSA-mwm8-39rw-8826.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-mwm8-39rw-8826

Published

2026-10-02T23:11:51Z

Modified

2026-10-02T23:30:05Z

Severity

6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator

Summary

sqlite3-ruby: Use-After-Free in SQLite Aggregate Arguments in Heap-Allocated Argument Array

Details

Summary

Using Database#create_aggregate, #create_aggregate_handler, or Database#define_aggregator to define an aggregate function that takes two or more arguments, and then evaluating it over TEXT or BLOB column values, can free the Ruby objects holding those arguments while a later argument is still being converted, during ordinary garbage collection. The aggregate's step method then receives an incorrect object, or the process crashes with a segmentation fault.

Mitigation

Upgrade to sqlite3 gem v2.9.6 or later.

There is no reliable workaround. If you cannot upgrade, avoid defining aggregate functions that take two or more arguments. Restricting column value sizes is not a mitigation: smaller values make the defect fire less often but do not prevent it.

Severity

The sqlite3-ruby maintainers assess this as Medium severity (CVSS 4.0 score 6.3). It is reached through ordinary garbage collection without any unusual code structuring: an application is exposed whenever it evaluates a multi-argument aggregate over TEXT or BLOB values whose size an attacker can influence. The demonstrated impact is an incorrect value passed to the aggregate's step method, or a process crash; no controlled memory write or general denial-of-service exploit has been demonstrated.

Credits

Reported by Jeremy Daer (@jeremy).

Database specific

{
    "cwe_ids":  [
        "CWE-416"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-10-02T23:11:51Z",
    "nvd_published_at":  null,
    "severity":  "MODERATE"
}

References

Affected packages

RubyGems / sqlite3

Package

Name: sqlite3
Purl: pkg:gem/sqlite3

Affected ranges

Type: ECOSYSTEM
Events: Introduced

1.4.0

Fixed

2.9.6

Affected versions

1.*

1.4.0

1.4.1

1.4.2

1.4.3

1.4.4

1.5.0.rc1

1.5.0.rc2

1.5.0

1.5.1

1.5.2

1.5.3

1.5.4

1.6.0.rc1

1.6.0.rc2

1.6.0

1.6.1

1.6.2

1.6.3

1.6.4

1.6.5.rc1

1.6.5

1.6.6

1.6.7

1.6.8

1.6.9

1.7.0

1.7.1

1.7.2

1.7.3

2.*

2.0.0

2.0.1

2.0.2

2.0.3

2.0.4

2.1.0.rc1

2.1.0.rc2

2.1.0.rc3

2.1.0

2.1.1

2.2.0

2.3.0

2.3.1

2.4.0

2.4.1

2.5.0.rc1

2.5.0

2.6.0

2.7.0

2.7.1

2.7.2

2.7.3

2.7.4

2.8.0

2.8.1

2.9.0

2.9.1

2.9.2.rc2

2.9.2

2.9.3

2.9.4

2.9.5

Database specific

last_known_affected_version_range

"<= 2.9.5"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mwm8-39rw-8826/GHSA-mwm8-39rw-8826.json"