What’s Vulnerable › Vulnerabilities

CVE-2026-2259: aardappel lobster Parsing parser.h ParseStatements memory corruption

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-10 · updated 2026-06-17
• Weakness: CWE-119

Description

A vulnerability has been found in aardappel lobster up to 2025.4. Affected by this issue is the function lobster::Parser::ParseStatements in the library dev/src/lobster/parser.h of the component Parsing. The manipulation leads to memory corruption. The attack can only be performed from a local environment. The exploit has been disclosed to the public and may be used. The identifier of the patch is 2f45fe860d00990e79e13250251c1dde633f1f89. Applying a patch is the recommended action to fix this issue.

Affected products

• aardappel lobster: through 2025.4

References

• https://github.com/aardappel/lobster/
• https://github.com/aardappel/lobster/commit/2f45fe860d00990e79e13250251c1dde633f1f89
• https://github.com/aardappel/lobster/issues/396
• https://github.com/aardappel/lobster/issues/396#issuecomment-3849019040
• https://github.com/oneafter/0204/blob/main/lob2/repro.lobster
• https://vuldb.com/?ctiid.345006
• https://vuldb.com/?id.345006
• https://vuldb.com/?submit.753168

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