CVE-2026-43980 json
Malla: Stored XSS via Meshtastic node names in multiple frontend pages
published 2026-06-03 5 mo ago modified 2026-10-12 27 d ago also GHSA-ch57-39q2-4crm , PYSEC-2026-2618 , EUVD-2026-64171
- cvss
- 6.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 25%
- public exploits
- 0
- none known
Summary
Malla is a web analyzer for Meshtastic networks based on MQTT data. Prior to commit 4086e2b5f61615a813b70b25bc76095083552135, code names (long_name, short_name) received via MQTT are stored in SQLite without sanitization and rendered into the DOM without escaping. Any participant on a public Meshtastic MQTT broker can set a malicious node name that executes JavaScript in the browser of every Malla dashboard visitor. Commit 4086e2b5f61615a813b70b25bc76095083552135 fixes the issue.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/zenitraM/malla/security/advisories/GHSA-ch57-39q2-4crm referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L |
| GitHub | 3.1 | 6.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L |
| OSV | 3.1 | 6.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | malla | <=0.1.7 |
no fix listed |
Affected products
- zenitraM malla
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/zenitraM/malla/commit/4086e2b5f61615a813b70b25bc76095083552135
web
-
github.com
/zenitraM/malla/security/advisories/GHSA-ch57-39q2-4crm
exploit, web
- github.com /pypa/advisory-database/tree/main/vulns/malla/PYSEC-2026-2618.yaml
-
github.com
/zenitraM/malla
package
-
pypi.org
/project/malla
package
-
github.com
/advisories/GHSA-ch57-39q2-4crm
advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-43980
advisory
Sources
- CVE List CVE-2026-43980
- GitHub Advisory GHSA-ch57-39q2-4crm
- NVD CVE-2026-43980
- OSV PYSEC-2026-2618
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.