CVE-2026-2887Public exploit

Local compiler crash via recursive type signatures

Published Feb 21, 2026 · Updated Feb 21, 2026

Uncontrolled recursion in aardappel Lobster 2025.0 through 2025.4 allows local users to crash the compiler with a crafted source file. The TypeName, Signature, and FormatArg routines repeatedly expand a self-referential function type without a recursion-depth guard. Executing the file locally exhausts the process stack and terminates the compiler; no confidentiality or integrity impact is reported.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled recursion in aardappel Lobster 2025.0 through 2025.4 allows local users to crash the compiler with a crafted source file. The TypeName, Signature, and FormatArg routines repeatedly expand a self-referential function type without a recursion-depth guard. Executing the file locally exhausts the process stack and terminates the compiler; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2026-2887
Published
Feb 21, 2026
Updated
Feb 21, 2026
Vendor
aardappel
Product
Lobster
Classifications
CWE-674, CWE-404, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 21, 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=2025.0
  2. Affected versionversion=2025.1
  3. Affected versionversion=2025.2
  4. Affected versionversion=2025.3
  5. Affected versionversion=2025.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

aardappel · Lobsterversion=2025.0; version=2025.1; version=2025.2; version=2025.3; version=2025.4

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1.7VulDBAV:L/AC:L/Au:S/C:N/I:N/A:P
3.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
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

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-674Uncontrolled Recursion
CWE-404Improper Resource Shutdown or Release
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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