Out-of-Bounds Write in Struktur (CVE-2026-49295)
Summary
Out-of-bounds write in Struktur (CVE-2026-49295). Risk of unauthorized operations or information disclosure. Exploitable via PocStFoll.
Original description
The description as published by the source.
libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted H.265 bitstream can cause an out-of-bounds array write in decoder_context::process_reference_picture_set() (libde265/decctx.cc:1376). The root cause is a missing aggregate bound check on predicted short-term reference picture set entries. Individual list sizes are validated, but the combined count after predicted RPS construction can exceed the 16-entry PocStFoll array, writing at index 16. Version 1.0.20 patches the issue.
Source: NIST National Vulnerability Database NVD
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-2026-49295 has been found in Struktur.
Attackers can target a specific entry point like PocStFoll over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 7.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Struktur CVE-2026-49295" on the vendor's site.
CVE-2026-49295 (Struktur) — CWE-787 / CVSS v3 7.1
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: PocStFoll
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.
Out-of-bounds write (CWE-787) exists in Struktur. Attackers reach the vulnerable code path via PocStFoll without authentication.
Check the vendor advisory for the affected versions of Struktur. Attack surface: PocStFoll.
Severity: High (CVSS 7.1/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Struktur' . 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
-
1Identify exposure identify
grep -r 'Struktur' . | 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
Strukturを grep し、稼働しているサービス・バージョンを把握する。 -
2Post-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。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- BellSoft Alpaquita BELL-CVE-2026-49295 libde265 Fixed in: 1.1.1-r0
- Debian DEBIAN-CVE-2026-49295 libde265 Fixed in: 1.0.11-1+deb12u3
- Ubuntu UBUNTU-CVE-2026-49295 libde265 Fixed in: 1.0.2-2ubuntu0.16.04.1~esm6
References
- exploit github.com
- patch security-advisories@github.com