Vulnerability in GNU Aspell (CVE-2026-103658)
Summary
Vulnerability in GNU Aspell (CVE-2026-103658). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 0.60.8.3 or later.
Original description
The description as published by the source.
GNU Aspell through 0.60.8.2 contains a heap-based buffer overflow write (CWE-122) in its read-only dictionary loader. String::reserve() in common/string.hpp computes its capacity check with a signed int ((int)s + 1), so a requested size of 0x7FFFFFFF wraps negative and the backing buffer is never grown. ReadOnlyDict::load() in modules/speller/default/readonly_ws.cpp passes the unvalidated 32-bit size fields from a .rws dictionary header into this path, so a crafted .rws file with a valid endian marker (12345678) and an oversized length field (e.g. lang_name_size = 0x7FFFFFFF) causes attacker-controlled data to be written out of bounds past an undersized heap allocation. An attacker who induces a victim to load a malicious dictionary — for example via aspell dump master — can corrupt heap memory, resulting in denial of service and potentially code execution. Fixed in 0.60.8.3.
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-2026-103658 has been found in GNU Aspell.
Risk of unauthorized operations or information disclosure. CVSS score: 5.9/10.
What to do: upgrade GNU Aspell to 0.60.8.3 or later.
If unsure, ask your IT team or search "GNU Aspell CVE-2026-103658" on the vendor's site.
CVE-2026-103658 (GNU Aspell) — CWE-122 / CVSS v3 5.9
Attack vector: local / unauthenticated / no user interaction
Patched: 0.60.8.3 — 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.
A vulnerability (CWE-122) exists in GNU Aspell.
Check the vendor advisory for the affected versions of GNU Aspell.
Severity: Medium (CVSS 5.9/10). Risk of unauthorized operations or information disclosure.
Update to 0.60.8.3.
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. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで GNU Aspell を使っているサービスとバージョンを洗い出す。
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2Apply patch patch
Upgrade GNU Aspell to 0.60.8.3ステージング環境で 0.60.8.3 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。
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3Post-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
- Ubuntu UBUNTU-CVE-2026-103658 aspell
References
- web github.com