How severe is CVE-2026-11703?

CVE-2026-11703 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-11703 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-11703?

CVE-2026-11703 affects Wolfssl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-11703?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-11703 have an EU (EUVD) identifier?

Yes. CVE-2026-11703 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39576.

When was CVE-2026-11703 published?

CVE-2026-11703 was published on 2026-06-25 and last updated on 2026-06-27.

CVE-2026-11703

CVE-2026-11703 is a high-severity vulnerability in Wolfssl with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 6.0
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39576
Weakness: CWE-287
Affected product: Wolfssl
Published: 2026-06-25
Last modified: 2026-06-27

Description

Missing SNI/ALPN binding on stateful (session-ID) resumption, which previously skipped the binding check performed for ticket-based resumption. A cached session could be resumed under a different SNI/ALPN than originally negotiated and, where client-authentication policy differs across virtual hosts, carry the cached peer-authentication state into a context it was not established for. Resumption now verifies the SNI/ALPN binding for all paths and declines (falling back to a full handshake) on mismatch.

Frequently asked questions

What is CVE-2026-11703?: Missing SNI/ALPN binding on stateful (session-ID) resumption, which previously skipped the binding check performed for ticket-based resumption. A cached session could be resumed under a different SNI/ALPN than originally negotiated and, where client-authentication policy differs across virtual hosts, carry the cached peer-authentication state into a context it was not established for. Resumption now verifies the SNI/ALPN binding for all paths and declines (falling back to a full handshake) on mismatch.
How severe is CVE-2026-11703?: CVE-2026-11703 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-11703 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-11703?: CVE-2026-11703 affects Wolfssl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-11703?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-11703 have an EU (EUVD) identifier?: Yes. CVE-2026-11703 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39576.
When was CVE-2026-11703 published?: CVE-2026-11703 was published on 2026-06-25 and last updated on 2026-06-27.

References

Affected products (1)

cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*

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