EUVD-2026-42937Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable via crafted file upload with no authentication or interaction in automated pipelines; impact is limited to application crash with no confidentiality or integrity effect.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Panic-triggering denial of service in the Excelize Go library (all versions prior to 2.11.0) allows any actor who can supply a crafted XLSX file to crash the consuming application. The root cause is an integer bounds check that validates only the upper bound of shared-string indices, permitting a cell value of -1 to reach a slice-index operation as a negative integer and cause a Go runtime panic in GetCellValue or GetRows. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target application must call `GetCellValue` or `GetRows` on an attacker-supplied XLSX file using Excelize prior to v2.11.0. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 6.9 (Medium) correctly captures the attack profile: network-reachable via a crafted file, low complexity, no privileges or user interaction required for automated server-side processing, but impact is confined to availability (VA:L) with no confidentiality or integrity consequences. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts an XLSX file containing a cell that references shared-string index -1 in the sharedStrings XML segment, then submits it to a web service or API endpoint that uses Excelize to parse uploaded spreadsheets. When the application calls `GetCellValue` or `GetRows`, the unchecked negative index causes a Go runtime panic; if the application lacks a `recover()` wrapper, the entire process or goroutine crashes, producing a denial of service. … |
| Remediation | Upgrade Excelize to v2.11.0, which resolves the vulnerability by adding a lower-bound index check. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Denial of service in the Excelize Go library (github.com/xuri/excelize/v2, a.k.a. qax-os/excelize) before 2.11.0 allows
Uncontrolled memory and CPU consumption in Excelize (qax-os/excelize), the widely used Go library for reading and writin
Same weakness CWE-248 – Uncaught Exception
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External POC / Exploit Code
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