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OSV-2026-863
Vulnerability in htslib (OSV-2026-863)
Summary
vulnerability in htslib (OSV-2026-863). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `1b3225f11b7bb55781ad7927f3ef343bc810a21d, d94071f3dd9613ab66f177e1237660855a56f0ed` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **OSV-2026-863** has been found in htslib.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade htslib to **1b3225f11b7bb55781ad7927f3ef343bc810a21d, d94071f3dd9613ab66f177e1237660855a56f0ed** or later.
If unsure, ask your IT team or search "htslib OSV-2026-863" on the vendor's site.
OSV-2026-863 (htslib) —
Patched: `1b3225f11b7bb55781ad7927f3ef343bc810a21d, d94071f3dd9613ab66f177e1237660855a56f0ed` — 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 htslib.
📍 Affected scope
htslib — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **1b3225f11b7bb55781ad7927f3ef343bc810a21d, d94071f3dd9613ab66f177e1237660855a56f0ed**.
🛡️ 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 'htslib' .` 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
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1Identify exposure identify
grep -r 'htslib' . | 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 `htslib` を grep し、稼働しているサービス・バージョンを把握する。
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6Apply patch patch
Upgrade htslib to 1b3225f11b7bb55781ad7927f3ef343bc810a21d, d94071f3dd9613ab66f177e1237660855a56f0edステージング環境で 1b3225f11b7bb55781ad7927f3ef343bc810a21d, d94071f3dd9613ab66f177e1237660855a56f0ed 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。
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7Post-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
OSS-Fuzz
htslib
[{"repo":"https:\/\/github.com\/samtools\/htslib.git","type":"GIT","events":[{"introduced":"d926270f580aa64fab4634859d4518d2d7a5dd7e"},{"fixed":"1b3225f11b7bb55781ad7927f3ef343bc810a21d"},{"fixed":"d94071f3dd9613ab66f177e1237660855a56f0ed"}]}]