Skip to content
CVE PROGRAM SOURCE RECORD2.1 Low

CVE-2026-78691

Unescaped backslash allows LIKE wildcard injection in AshSql string search

Description

Improper Neutralization of Special Elements in Data Query Logic vulnerability in ash-project ash_sql allows a user who supplies a search term to contains/2, string_starts_with/2, or string_ends_with/2 to inject live SQL LIKE wildcards, turning a literal substring search into an attacker-controlled pattern match. The escape helpers in AshSql.Expr prefix % and _ with a backslash but never escape a backslash already present in the input. Because backslash is the default LIKE escape character, the escaping defeats itself: the input \% becomes the pattern fragment \\%, where \\ is a literal backslash and the attacker's % remains a live wildcard. The search value stays parameterized, so this is confined to the LIKE pattern grammar rather than full SQL. An attacker can widen matches to probe values, slip past a negated contains(...) guard, or crash the query with a trailing lone backslash. This issue affects ash_sql: from 0.1.1-rc.10 before 0.7.1.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

ash-project ash_sql

Default version status: unaffected

  • 0.1.1-rc.10 to < 0.7.1affected
pkg:hex/ash_sql

ash-project ash_sql

Default version status: unaffected

  • cfc7da474c5be2190fd62664a83a689377a8d512 to < d95c55c64b1b42cc2fd30211a4913f3145156cd4affected
pkg:github/ash-project/ash_sql

References