How severe is CVE-2026-2656?

CVE-2026-2656 has a CVSS 3.x base score of 2.5, rated low severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-2656 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2656?

CVE-2026-2656 affects Chaiscript. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2656?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-2656 have an EU (EUVD) identifier?

Yes. CVE-2026-2656 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7646.

When was CVE-2026-2656 published?

CVE-2026-2656 was published on 2026-02-18 and last updated on 2026-06-17.

CVE-2026-2656

CVE-2026-2656 is a low-severity vulnerability in Chaiscript with a CVSS 3.x base score of 2.5. 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-119.

Key facts

Severity: Low (CVSS 3.x base score 2.5)
CVSS v2: 1.0
CVSS v4: 1.1
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7646
Weakness: CWE-119
Affected product: Chaiscript
Published: 2026-02-18
Last modified: 2026-06-17

Description

A flaw has been found in ChaiScript up to 6.1.0. This affects the function chaiscript::Type_Info::bare_equal of the file include/chaiscript/dispatchkit/type_info.hpp. This manipulation causes use after free. The attack requires local access. The attack's complexity is rated as high. The exploitability is reported as difficult. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Frequently asked questions

What is CVE-2026-2656?: A flaw has been found in ChaiScript up to 6.1.0. This affects the function chaiscript::Type_Info::bare_equal of the file include/chaiscript/dispatchkit/type_info.hpp. This manipulation causes use after free. The attack requires local access. The attack's complexity is rated as high. The exploitability is reported as difficult. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.
How severe is CVE-2026-2656?: CVE-2026-2656 has a CVSS 3.x base score of 2.5, rated low severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-2656 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2656?: CVE-2026-2656 affects Chaiscript. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2656?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-2656 have an EU (EUVD) identifier?: Yes. CVE-2026-2656 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7646.
When was CVE-2026-2656 published?: CVE-2026-2656 was published on 2026-02-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:chaiscript:chaiscript:*:*:*:*:*:*:*:*

More vulnerabilities in Chaiscript

CVE-2026-3384 — Low (CVSS 3.3): A security vulnerability has been detected in ChaiScript up to 6.1.0. This impacts the function…
CVE-2026-3383 — Low (CVSS 3.3): A weakness has been identified in ChaiScript up to 6.1.0. This affects the function chaiscript::Boxed_Number::go of the…
CVE-2026-3382 — Low (CVSS 3.3): A security flaw has been discovered in ChaiScript up to 6.1.0. The impacted element is the function…
CVE-2026-2655 — Low (CVSS 2.5): A vulnerability was detected in ChaiScript up to 6.1.0. The impacted element is the function…

All CVEs affecting Chaiscript →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →