TI-2026-09874 Aliases CVE-2026-11443 GHSA-m8wq-7mhg-mgm7

Cross-site scripting in Allegra

LOW 23CWE-79Published 2026-06-12 · Updated 2026-06-15

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Allegra downloadAttachment Cross-Site Scripting Authentication Bypass Vulnerability. This vulnerability allows remote attackers to execute arbitrary script on affected installations of Allegra. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the downloadAttachment method. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of arbitrary script. An attacker can leverage this vulnerability to execute script in the context of the current user. Was ZDI-CAN-28236.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00819 57th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

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
Allegra	Allegra	8.1.6.22	—	No fix listed	CNA

Allegra VendorAllegra Affected 8.1.6.22 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:alltena:allegra::::::::	—	—	Allegra

cpe:2.3:a:alltena:allegra:*:*:*:*:*:*:*:* Versions — — ·Allegra

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2026-06-12
Allegra — vendor-provided URL
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-09873 Path traversal in AllegraPriority LOW 31
Show all 2 records → Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-11443
2026-10-03 Alias added: GHSA-m8wq-7mhg-mgm7

References

Advisory 1

vendor-provided URL

Other 1

ZDI-26-358

TI-2025-05624 Weak password recovery in Allegra CVSS 3.0CRITICAL 9.8
TI-2023-28290 Path traversal in Allegra CVSS 3.1CRITICAL 9.8
TI-2023-28289 Hard-coded credentials in Allegra CVSS 3.1CRITICAL 9.8
TI-2025-03063 Path traversal in Allegra CVSS 3.1HIGH 8.8
TI-2023-28717 Path traversal in Allegra CVSS 3.1HIGH 7.3
TI-2023-28295 Improper access control in Allegra CVSS 3.1HIGH 7.3

See all 23 →

Sources

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