CVE-2026-2662Public exploit

Interpreter crash via out-of-bounds closure-transform read

Published Feb 18, 2026 · Updated Feb 18, 2026

Out-of-bounds read in FascinatedBox Lily 2.0 through 2.3 allows local users to crash the interpreter via a crafted Lily program. During closure transformation, count_transforms reads a 16-bit value 68 bytes past a 16-byte heap allocation while processing the program. Executing the crafted file locally reaches the fault; the published reproducer demonstrates an AddressSanitizer abort, not data disclosure or code execution.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in FascinatedBox Lily 2.0 through 2.3 allows local users to crash the interpreter via a crafted Lily program. During closure transformation, count_transforms reads a 16-bit value 68 bytes past a 16-byte heap allocation while processing the program. Executing the crafted file locally reaches the fault; the published reproducer demonstrates an AddressSanitizer abort, not data disclosure or code execution.

The record

CVE
CVE-2026-2662
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
FascinatedBox
Product
Lily
Classifications
CWE-119, CWE-125, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0
  2. Affected versionversion=2.1
  3. Affected versionversion=2.2
  4. Affected versionversion=2.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

FascinatedBox · Lilyversion=2.0; version=2.1; version=2.2; version=2.3

Published CVSS scores

1.9VulDBCVSS: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
3.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1.7VulDBAV:L/AC:L/Au:S/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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