VulnSocial

CVE-2026-55890Disclosure

LOWCVSS 4.8 · MEDIUM

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

Grav is a file-based Web platform. Prior to 2.0.0-rc.9, Grav's incomplete fix for stored XSS through the Markdown media attribute action (CVE-2026-42841) leaves the sibling MediaObjectTrait::style method reachable through the same Markdown excerpt-action pipeline, allowing an editor to save Markdown image style parameters that are written into the rendered img style attribute without sanitization. This issue is fixed in version 2.0.0-rc.9.

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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

STABLE

Threat summary

  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 2 classified signals
  • Peaked 1d ago at 1 mentions (2026-06-18); latest day: 1
  • 2 total mentions across 2 days

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-06-18: 1Mentions · 2026-09-17: 1Technical Details · 2026-09-17: 106-1809-17
Signal classification1 categories
Disclosure
2100.0%
Referenced assets1 URL
Full discourse2 posts
  • DailyCVE@dailycve
    Disclosure

    🟠 Grav CMS, Audio/Video rawHtml XSS, #CVE ID: N/A (sibling #CVE-2026-42841, #CVE-2026-55890) (Medium) -DC-Sep2026-2431 https://dailycve.com/grav-cms-audio-video-rawhtml-xss-cve-id-n-a-sibling-cve-2026-42841-cve-2026-55890-medium-dc-sep2026-2431/

    Post summary

    This text is a daily CVE notification announcing a Medium-severity Cross-Site Scripting (XSS) vulnerability in the Audio/Video component of Grav CMS, referencing sibling CVE identifiers without detailing exploits or patches.

    0000061
    236 followersView on X
  • Abdullah Kareem@CyberKareem
    Disclosure

    Second CVE assigned. CVE-2026-55890. Two now, and the momentum feels good. On to the next one. 🫡 https://t.co/dxEwg73xNA

    Post summary

    The message announces that CVE-2026-55890 has been assigned, marking the second CVE in a series, with no additional technical or remedial information provided.

    0000048
    238 followersView on X

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