TI-2026-76997 Aliases CVE-2026-111088 GHSA-3p55-3gfg-2x98

Stored cross-site scripting in Stormshield Network Security VPN logs

LOW 28CWE-79Published 2026-10-20 · Updated 2026-10-29

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Stormshield Network Security versions 4.3.0 through 4.3.44, 4.8.0 through 4.8.19, 5.0.0 through 5.0.9 and 5.1.0 through 5.1.3 are affected. A stored cross-site scripting flaw (CWE-79) in the SNS VPN log monitoring screen lets injected script persist and run in the browser of users who view the logs. A remote attacker with low privileges can exploit it without user interaction, with high confidentiality impact.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A Stored Cross-Site Scripting vulnerability exists in the SNS VPN log monitoring screen.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00219 12th percentileScored 2026-11-07

Fix Fixed Stormshield Network Security (Stormshield): 4.3.45 QS, 4.8.20 LTSB, 5.0.10 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Stormshield	Stormshield Network Security	4.3.0 – 4.3.44; 4.8.0 – 4.8.19; 5.0.0 – 5.0.9; 5.1.0 – 5.1.3	4.3.45 QS, 4.8.20 LTSB, 5.0.10, 5.1.4 EA	Patch available	CNA

Stormshield Network Security VendorStormshield Affected 4.3.0 – 4.3.44; 4.8.0 – 4.8.19; 5.0.0 – 5.0.9; 5.1.0 – 5.1.3 Fixed in 4.3.45 QS, 4.8.20 LTSB, 5.0.10, 5.1.4 EA Patch available CNA

Remediation

Upgrade Stormshield Network Security to 4.3.45 QS, 4.8.20 LTSB, 5.0.10 or 5.1.4 EA.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fix · CNA Stormshield Network Security (Stormshield) Fixed in 4.3.45 QS, 4.8.20 LTSB, 5.0.10, 5.1.4 EA

Timeline

2026-10-20 Threatist record created from CVE-2026-111088
2026-10-21 Alias added: GHSA-3p55-3gfg-2x98
2026-10-22 Priority changed: MEDIUM → LOW
2026-10-29 CISA SSVC decision points changed

References

Other 1

https://advisories.stormshield.eu/2026-030/

TI-2022-17498 zlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in inflate in… CVSS 3.1CRITICAL 9.8
TI-2023-00271 X.400 address type confusion in X.509 GeneralName CVSS 3.1HIGH 7.4
TI-2022-13924 The llhttp parser <v14.20.1, <v16.17.1 and <v18.9.1 in the http module in Node.js does… CVSS 3.1MEDIUM 6.5
TI-2023-06741 Buffer overflow in Cisco Secure Web Appliance CVSS 3.1CRITICAL 9.8
TI-2022-13925 The llhttp parser <v14.20.1, <v16.17.1 and <v18.9.1 in the http module in Node.js does… CVSS 3.1MEDIUM 6.5
TI-2022-04067 Double free after calling PEM_read_bio_ex CVSS 3.1HIGH 7.5

See all 68 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences