CVE-2026-2703

LOW EPSS 11.1%
Published Feb 19, 20264mo ago · Modified Jun 17, 20261w ago
1.9 CVSS 4.0
Low
Find Similar
Published Feb 19, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
1.9
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
11.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-189
CWE-193

Affected Products 1

VendorProductVersionRange
xlnt-communityxlnt* ≤1.6.1

References 7

  • github.com https://github.com/oneafter/0128/blob/main/xl1/repro
    Exploit
  • github.com https://github.com/xlnt-community/xlnt/
    Product
  • github.com https://github.com/xlnt-community/xlnt/commit/f2d7bf494e5c52706843cf7eb9892821bffb0734
    Patch
  • github.com https://github.com/xlnt-community/xlnt/issues/137
    ExploitIssue TrackingVendor Advisory
  • vuldb.com https://vuldb.com/?ctiid.346649
    Permissions RequiredVDB Entry
  • vuldb.com https://vuldb.com/?id.346649
    Third Party AdvisoryVDB Entry
  • vuldb.com https://vuldb.com/?submit.754377
    Third Party AdvisoryVDB Entry

Remediation

  • github.com https://github.com/xlnt-community/xlnt/commit/f2d7bf494e5c52706843cf7eb9892821bffb0734
    Patch