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CVE-2025-26623
Use-After-Free in exiv2 (CVE-2025-26623)
Summary
vulnerability in exiv2 (CVE-2025-26623). Risk of unauthorized operations or information disclosure. Exploitable via ``fixiso``. Mitigation: upgrade to `0.28.5` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2025-26623** has been found in exiv2.
Attackers can target a specific entry point like ``fixiso`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade exiv2 to **0.28.5** or later.
If unsure, ask your IT team or search "exiv2 CVE-2025-26623" on the vendor's site.
CVE-2025-26623 (exiv2) — CWE-416 /
Attack surface: `fixiso`
Patched: `0.28.5` — 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
**use-after-free** (CWE-416) exists in exiv2. Attackers reach the vulnerable code path via ``fixiso`` without authentication.
📍 Affected scope
exiv2 — . Attack surface: `fixiso`.
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **0.28.5**.
🛡️ 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 'exiv2' .` 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 'exiv2' . | 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 `exiv2` 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 exiv2 to 0.28.5ステージング環境で 0.28.5 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
PyPI
exiv2
[{"type":"ECOSYSTEM","events":[{"introduced":"0.28.0"},{"fixed":"0.28.5"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2025-26623
- advisory https://github.com/advisories/GHSA-38h4-fx85-qcx7
- package https://github.com/Exiv2/exiv2
- package https://pypi.org/project/exiv2
- web https://github.com/Exiv2/exiv2/security/advisories/GHSA-38h4-fx85-qcx7
- web https://github.com/Exiv2/exiv2/issues/3168
- web https://github.com/Exiv2/exiv2/pull/3174
- web https://github.com/jim-easterbrook/python-exiv2/commit/4cc875e392f9e0bc705fe03d929b9a382b78dae4