CVE-2026-59162
CVE-2026-59162 is a high-severity vulnerability in Excelize 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-248.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v4: 6.9
- EPSS exploit prediction: 0% (32nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-248
- Affected product: Excelize
- Published:
- Last modified:
Description
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, Excelize parses shared-string cell values with strconv.Atoi and checks only the upper bound before indexing the shared string slice, allowing an XLSX file containing a shared-string cell with -1 to trigger sharedStrings[-1] and panic when read through GetCellValue or GetRows. This issue is fixed in version 2.11.0.
Frequently asked questions
- What is CVE-2026-59162?
- Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, Excelize parses shared-string cell values with strconv.Atoi and checks only the upper bound before indexing the shared string slice, allowing an XLSX file containing a shared-string cell with -1 to trigger sharedStrings[-1] and panic when read through GetCellValue or GetRows. This issue is fixed in version 2.11.0.
- How severe is CVE-2026-59162?
- CVE-2026-59162 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 none, and availability high.
- Is CVE-2026-59162 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-59162?
- CVE-2026-59162 affects Excelize. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-59162?
- 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.
- When was CVE-2026-59162 published?
- CVE-2026-59162 was published on 2026-07-10 and last updated on 2026-07-16.
References
- https://github.com/qax-os/excelize/commit/93f0b3caed37f21ef5079e3259c6c21dcfe68453
- https://github.com/qax-os/excelize/pull/2331
- https://github.com/qax-os/excelize/releases/tag/v2.11.0
- https://github.com/qax-os/excelize/security/advisories/GHSA-fx5j-qcqg-grpf
Affected products (1)
- cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:*
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- CVE-2026-59161 — High (CVSS 7.5): Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the streaming…
- CVE-2026-54063 — High (CVSS 7.5): Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the…
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