How severe is CVE-2026-2703?

CVE-2026-2703 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-2703 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-2026-2703?

CVE-2026-2703 affects Xlnt-community Xlnt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2703?

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

Does CVE-2026-2703 have an EU (EUVD) identifier?

Yes. CVE-2026-2703 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7426.

When was CVE-2026-2703 published?

CVE-2026-2703 was published on 2026-02-19 and last updated on 2026-06-17.

CVE-2026-2703

CVE-2026-2703 is a low-severity vulnerability in Xlnt-community Xlnt with a CVSS 3.x base score of 3.3. 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-189.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
CVSS v2: 1.7
CVSS v4: 1.9
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7426
Weakness: CWE-189
Affected product: Xlnt-community Xlnt
Published: 2026-02-19
Last modified: 2026-06-17

Description

A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::decode_base64 of the file source/detail/cryptography/base64.cpp of the component Encrypted XLSX File Parser. Executing a manipulation can lead to off-by-one. The attack requires local access. The exploit has been made available to the public and could be used for attacks. This patch is called f2d7bf494e5c52706843cf7eb9892821bffb0734. Applying a patch is advised to resolve this issue.

Frequently asked questions

What is CVE-2026-2703?: A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::decode_base64 of the file source/detail/cryptography/base64.cpp of the component Encrypted XLSX File Parser. Executing a manipulation can lead to off-by-one. The attack requires local access. The exploit has been made available to the public and could be used for attacks. This patch is called f2d7bf494e5c52706843cf7eb9892821bffb0734. Applying a patch is advised to resolve this issue.
How severe is CVE-2026-2703?: CVE-2026-2703 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-2703 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-2026-2703?: CVE-2026-2703 affects Xlnt-community Xlnt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2703?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-2703 have an EU (EUVD) identifier?: Yes. CVE-2026-2703 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7426.
When was CVE-2026-2703 published?: CVE-2026-2703 was published on 2026-02-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:xlnt-community:xlnt:*:*:*:*:*:*:*:*

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