CVE-2026-78691 - Unescaped backslash allows LIKE wildcard injection in AshSql string search

CVE-2026-78691 - Unescaped backslash allows LIKE wildcard injection in AshSql string search

https://cvefeed.io/rssfeed/latest.atom / Sun, 08/30/2026 - 16:29
CVE ID :CVE-2026-78691
Published : Aug. 30, 2026, 12:17 p.m. | 13 minutes ago
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.
Severity: 2.1 | LOW
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