CVE-2026-32284GO-2026-4740GHSA-H9Q6-HC68-35RPGO-2026-4513
Denial of service in github.com/shamaton/msgpack
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 2.4.1, 3.1.1
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: poc
- Automatable: yes
- Technical impact: partial
Summary
The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- github.com/shamaton/msgpack
Version range not reported
- github.com/shamaton/msgpack/v2
fixed in 2.4.1
- github.com/shamaton/msgpack/v3
fixed in 3.1.1
- github.com/shamaton/msgpack/v2Go
through 2.4.0
- github.com/shamaton/msgpack/v3Go
through 3.1.0
- github.com/shamaton/msgpackGo
All versions
- github.com/shamaton/msgpack/v2Go
fixed in 2.4.1
- github.com/shamaton/msgpack/v3Go
fixed in 3.1.1