CVE-2026-121796

validatedZero produced an exploit or a check.

GHSA-r386-r8vg-hrxg ↗EUVD-2026-118945 ↗

check availableZero validated a working check for it.not proven exploitableZero has a detection check, but hasn't produced a full working exploit yet.
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
Add From Server Lite < 6.0.0
fixed in 6.0.0
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
ETK-2026-3815Zero's internal tracking ID, independent of the CVE number., permanent identifier
+3h12mTTV
<1mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = trigger signal
trigger signal (cve.org) +0hcheck available+3h12magent stopped
0
+1h
+2h
+3h

description

Add From Server Lite versions before 6.0.0 do not properly restrict SVG uploads. An authenticated user with the Author role or higher can upload a crafted SVG that triggers stored cross-site scripting. Exploitation requires an account with one of those roles.

mitigation

Upgrade Add From Server Lite to version 6.0.0 or later. Until the upgrade is complete, prevent Author-level and other non-administrative users from uploading SVG files.

fixed in 6.0.0

check
available
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
deterministic
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
yes, high privileges
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
<1m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-11-07 06:00Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–

outcome

Upstream: a detection for this already ships elsewhere, so we didn't generate a new one. The credit goes to whoever did.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-11-07 06:00Z
    ghsa: trigger signal, started the run
  2. 2026-11-07 06:00Z
  3. 2026-11-07 09:12Z

this entry in the feed

GET /api/v1/feed/CVE-2026-121796

{
  "etk_id": "ETK-2026-3815",
  "cve_id": "CVE-2026-121796",
  "display_id": "CVE-2026-121796",
  "ghsa_id": "GHSA-r386-r8vg-hrxg",
  "euvd_id": "EUVD-2026-118945",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Stored cross-site scripting in Add From Server Lite SVG uploads",
  "summary": "Add From Server Lite versions before 6.0.0 do not properly restrict SVG uploads. An authenticated user with the Author role or higher can upload a crafted SVG that triggers stored cross-site scripting. Exploitation requires an account with one of those roles.",
  "mitigation": "Upgrade Add From Server Lite to version 6.0.0 or later. Until the upgrade is complete, prevent Author-level and other non-administrative users from uploading SVG files.",
  "vendor": null,
  "product": "Add From Server Lite",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 6.0.0"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "6.0.0"
      ],
      "package_name": "Add From Server Lite",
      "purl": null
    }
  ],
  "cwes": [
    79
  ],
  "cvss_score": 6.8,
  "cvss_src": "nvd",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "upstream",
  "exploit": false,
  "pipeline_minutes": 0.27030788333333333,
  "t0_at": "2026-11-07T06:00:27.240000+00:00",
  "signals": {
    "check": {
      "at": "2026-11-07T09:12:29.701220+00:00",
      "days": 0.13336181967592592,
      "is_lower_bound": false,
      "measured_at": "2026-11-07T06:00:27.240000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-11-07T06:00:27.240000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-07T06:00:27.240000+00:00",
      "url": "https://github.com/advisories/GHSA-r386-r8vg-hrxg"
    }
  }
}

published 2026-11-07 09:12Z
last change 2026-11-08 00:08Z

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