How severe is CVE-2026-2655?

CVE-2026-2655 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-2026-2655 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-2026-2655?

CVE-2026-2655 affects Chaiscript. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2655?

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

Does CVE-2026-2655 have an EU (EUVD) identifier?

Yes. CVE-2026-2655 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7647.

When was CVE-2026-2655 published?

CVE-2026-2655 was published on 2026-02-18 and last updated on 2026-06-17.

CVE-2026-2655

CVE-2026-2655 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-2026-7647
Weakness: CWE-119
Affected product: Chaiscript
Published: 2026-02-18
Last modified: 2026-06-17

Description

A vulnerability was detected in ChaiScript up to 6.1.0. The impacted element is the function chaiscript::str_less::operator of the file include/chaiscript/chaiscript_defines.hpp. The manipulation results in use after free. The attack requires a local approach. The attack requires a high level of complexity. The exploitability is regarded as difficult. The exploit is now public 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-2026-2655?: A vulnerability was detected in ChaiScript up to 6.1.0. The impacted element is the function chaiscript::str_less::operator of the file include/chaiscript/chaiscript_defines.hpp. The manipulation results in use after free. The attack requires a local approach. The attack requires a high level of complexity. The exploitability is regarded as difficult. The exploit is now public 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-2026-2655?: CVE-2026-2655 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-2026-2655 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-2026-2655?: CVE-2026-2655 affects Chaiscript. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2655?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-2655 have an EU (EUVD) identifier?: Yes. CVE-2026-2655 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7647.
When was CVE-2026-2655 published?: CVE-2026-2655 was published on 2026-02-18 and last updated on 2026-06-17.

References

Affected products (1)

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

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