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CVE-2026-126561

CVE-2026-126561

validatedZero produced an exploit or a check.

GHSA-9w3p-9m8x-j2mw ↗EUVD-2026-123076 ↗

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.
SemanticMediaWiki >= 2.5.0, < 7.4.1
fixed in 7.4.1
CWE-862 Missing Authorization
ETK-2026-4132Zero's internal tracking ID, independent of the CVE number., permanent identifier
pkg:composer/mediawiki/semantic-media-wiki
cvss7.1cna vendorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
+38mTTV
23mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = cve.org publication
trigger signal (cve.org) +0mcheck available+38magent stopped
0
+10min
+20min
+30min

description

SemanticMediaWiki versions 2.5.0 through before 7.4.1 improperly allow editors without page-protection permission to apply an edit-protection setting. An attacker with editor access can cause affected pages, potentially including pages using shared templates, to become unavailable for editing, moving, or deletion.

mitigation

Upgrade SemanticMediaWiki to version 7.4.1 or later. Until upgrading, restrict untrusted editor access and review pages and widely transcluded templates for unauthorized edit-protection settings.

fixed in 7.4.1

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, low privileges
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
–
agent run time
23m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-11-11 02:35Z
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

Check only, differential: the check fires on the vulnerable build and is silent on the patched one.

source signals

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

  1. 2026-11-11 02:35Z
    cve_org: trigger signal, started the run
    https://www.cve.org/CVERecord?id=CVE-2026-126561

this entry in the feed

GET /api/v1/feed/CVE-2026-126561

{
  "etk_id": "ETK-2026-4132",
  "cve_id": "CVE-2026-126561",
  "display_id": "CVE-2026-126561",
  "ghsa_id": "GHSA-9w3p-9m8x-j2mw",
  "euvd_id": "EUVD-2026-123076",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Missing authorization in SemanticMediaWiki page protection",
  "summary": "SemanticMediaWiki versions 2.5.0 through before 7.4.1 improperly allow editors without page-protection permission to apply an edit-protection setting. An attacker with editor access can cause affected pages, potentially including pages using shared templates, to become unavailable for editing, moving, or deletion.",
  "mitigation": "Upgrade SemanticMediaWiki to version 7.4.1 or later. Until upgrading, restrict untrusted editor access and review pages and widely transcluded templates for unauthorized edit-protection settings.",
  "vendor": "SemanticMediaWiki",
  "product": "SemanticMediaWiki",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2.5.0, < 7.4.1"
      ],
      "ecosystem": "composer",
      "fixed_versions": [
        "7.4.1"
      ],
      "package_name": "mediawiki/semantic-media-wiki",
      "purl": "pkg:composer/mediawiki/semantic-media-wiki"
    }
  ],
  "cwes": [
    862
  ],
  "cvss_score": 7.1,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 23.315715816666668,
  "t0_at": "2026-11-11T02:35:57.916000+00:00",
  "signals": {
    "check": {
      "at": "2026-11-11T03:14:14.020949+00:00",
      "days": 0.026575288761574074,
      "is_lower_bound": false,
      "measured_at": "2026-11-11T02:35:57.916000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-11-11T02:35:57.916000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-11T02:35:57.916000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-126561"
    }
  }
}

published 2026-11-11 02:50Z
last change 2026-11-11 04:14Z

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