Vulnerability in libpng1.6 (UBUNTU-CVE-2026-22801)

Summary

vulnerability in libpng1.6 (UBUNTU-CVE-2026-22801). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `1.6.54` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **UBUNTU-CVE-2026-22801** has been found in libpng1.6. Risk of unauthorized operations or information disclosure. CVSS score: ?/10. What to do: upgrade libpng1.6 to **1.6.54** or later. If unsure, ask your IT team or search "libpng1.6 UBUNTU-CVE-2026-22801" on the vendor's site.

UBUNTU-CVE-2026-22801 (libpng1.6) — Attack vector: local / unauthenticated / no user interaction Patched: `1.6.54` — 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

**A vulnerability** (unclassified) exists in libpng1.6.

📍 Affected scope

libpng1.6 — .

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure

🔧 How to fix

Update to **1.6.54**.

🛡️ 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 'libpng1.6' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response Actions (7 steps)

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

1
Identify exposure identify
```
grep -r 'libpng1.6' . | 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 `libpng1.6` を grep し、稼働しているサービス・バージョンを把握する。
6
Apply patch patch
```
Upgrade libpng1.6 to 1.6.54
```
ステージング環境で 1.6.54 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と、Step 3 で見つけた異常検知の続報チェックを含めること。
7
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 Step 3 と同じログクエリでアラート再発が無いか継続監視。

Affected packages

Ubuntu:Pro:18.04:LTS libpng1.6

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.34-1ubuntu0.18.04.2+esm2"}]}]

Ubuntu:Pro:20.04:LTS libpng1.6

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.37-2ubuntu0.1~esm2"}]}]

Ubuntu:22.04:LTS libpng1.6

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.37-3ubuntu0.3"}]}]

Ubuntu:24.04:LTS libpng1.6

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.43-5ubuntu0.3"}]}]

Ubuntu:25.10 libpng1.6

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.50-1ubuntu0.3"}]}]

Ubuntu:26.04:LTS libpng1.6

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.54-1"}]}]

References

advisory https://ubuntu.com/security/notices/USN-7963-1
advisory https://ubuntu.com/security/notices/USN-8035-1
report https://ubuntu.com/security/CVE-2026-22801
report https://www.cve.org/CVERecord?id=CVE-2026-22801
report https://www.openwall.com/lists/oss-security/2026/01/12/7
report https://github.com/pnggroup/libpng/security/advisories/GHSA-vgjq-8cw5-ggw8