VulnSocial

CVE-2026-43887General

LOWCVSS 7.3 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Outline is a service that allows for collaborative documentation. From 0.84.0 to 1.6.1, the Outline comment section permits users to mention other users; however, the backend does not validate or sanitize the href attribute associated with these mentions. As a result, potentially dangerous protocols (e.g., javascript:) are not filtered, introducing a risk of client-side code execution. This vulnerability is fixed in 1.7.0.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-79

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • General: 1 classified signal
  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-05-12: 1Technical Details · 2026-05-12: 105-12
Signal classification1 categories
General
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • Vulmon Vulnerability Feed@VulmonFeeds
    General

    CVE-2026-43887 Cross-Site Scripting via Unsanitized Mention Href in Outline 0.84.0-1.6.1 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-43887

    Post summary

    The post references a Cross‑Site Scripting vulnerability in Outline versions 0.84.0 through 1.6.1 (CVE‑2026‑43887) and links to a vulnerability detail page, but provides no PoC, exploit code, active exploitation, or patch information.

    0000050
    4.0K followersView on X

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