CVE-2026-3849
- Source
- https://cve.org/CVERecord?id=CVE-2026-3849
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3849.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-3849
- Downstream
- Published
- 2026-03-19T20:29:30Z
- Modified
- 2026-10-28T02:31:12Z
- Severity
-
- 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/V:D/RE:M/U:Amber CVSS Calculator
- Summary
- Buffer Overflow in HPKE via Oversized ECH Config
- Details
-
Stack Buffer Overflow in wc_HpkeLabeledExtract via Oversized ECH Config. A vulnerability existed in wolfSSL 5.8.4 ECH (Encrypted Client Hello) support, where a maliciously crafted ECH config could cause a stack buffer overflow on the client side, leading to potential remote execution and client program crash. This could be exploited by a malicious TLS server supporting ECH. Note that ECH is off by default, and is only enabled with enable-ech.
- Database specific
{ "cna_assigner": "wolfSSL", "cwe_ids": [ "CWE-787" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3849.json" }- References
Affected packages
Git / github.com/wolfssl/wolfssl
Affected ranges
- Type
- GIT
- Repo
- https://github.com/wolfssl/wolfssl
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "v5.6.0-stable" }, { "last_affected": "v5.8.4-stable" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "cpe": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*", "range": [ { "introduced": "5.6.0" }, { "fixed": "5.9.0" } ], "source": "CPE_RANGE" } ] }