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CVE-2026-77608 medium CVSS 6.1

Cross-Site Scripting (XSS) in mediawiki/semantic-media-wiki (CVE-2026-77608)

Summary

Cross-site scripting in mediawiki/semantic-media-wiki (CVE-2026-77608). Risk of unauthorized operations or information disclosure. Exploitable via value. Mitigation: upgrade to 7.2.0 or later.

Original description

The description as published by the source.

Failure mode

The value parameter was reflected back into rendered output and error messaging paths without enough output-context encoding.

Remediation

  • The form value is escaped before it is placed back into the input field.
  • Derived error messages are also escaped before being rendered into HTML.

Maintenance note

Do not treat error text as trusted just because it originated from validation. Validation output can still be attacker-influenced.

Source: NIST National Vulnerability Database NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-77608 has been found in mediawiki/semantic-media-wiki.
Attackers can target a specific entry point like value over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 6.1/10.
What to do: upgrade mediawiki/semantic-media-wiki to 7.2.0 or later.
If unsure, ask your IT team or search "mediawiki/semantic-media-wiki CVE-2026-77608" on the vendor's site.

CVE-2026-77608 (mediawiki/semantic-media-wiki) — CWE-79 / CVSS v3 6.1
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: value
Patched: 7.2.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

Cross-site scripting (XSS) (CWE-79) exists in mediawiki/semantic-media-wiki. Attackers reach the vulnerable code path via value without authentication.

📍 Affected scope

Check the vendor advisory for the affected versions of mediawiki/semantic-media-wiki. Attack surface: value.

🔥 Severity

Severity: Medium (CVSS 6.1/10). Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 7.2.0.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'mediawiki/semantic-media-wiki' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r 'mediawiki/semantic-media-wiki' . | grep -v node_modules

    リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で mediawiki/semantic-media-wiki を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Apply patch patch 
    Upgrade mediawiki/semantic-media-wiki to 7.2.0

    ステージング環境で 7.2.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。

  3. 3
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

composer mediawiki/semantic-media-wiki
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.2.0"}]}]

References

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