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

Quick assessment

Affected
ash-project ash_sql
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Ash Framework AshSql是Ash Framework组织的一个数据库系统。 Ash Framework AshSql 0.1.1-rc.10版本至0.7.1之前版本存在输入验证错误漏洞，该漏洞源于数据查询逻辑中的特殊元素中和不当，具体为AshSql.Expr的转义助手未转义输入中已存在的反斜杠，导致攻击者可注入SQL LIKE通配符，扩大匹配范围、绕过否定contains防护或导致查询崩溃。

CVSS 2.1 · Low EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1059.002 · AppleScript

Affected Version Matrix 2

VendorProduct Version RangeStatus
ash-project ash_sql 0.1.1-rc.10< 0.7.1 affected
cfc7da474c5be2190fd62664a83a689377a8d512< d95c55c64b1b42cc2fd30211a4913f3145156cd4 affected
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I. Basic Information for CVE-2026-78691

Vulnerability Information
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Vulnerability Title
Unescaped backslash allows LIKE wildcard injection in AshSql string search
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
数据查询逻辑中特殊元素的不当中和
Source: CVE Program / CVE List V5
Vulnerability Title
Ash Framework AshSql 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ash Framework AshSql是Ash Framework组织的一个数据库系统。 Ash Framework AshSql 0.1.1-rc.10版本至0.7.1之前版本存在输入验证错误漏洞，该漏洞源于数据查询逻辑中的特殊元素中和不当，具体为AshSql.Expr的转义助手未转义输入中已存在的反斜杠，导致攻击者可注入SQL LIKE通配符，扩大匹配范围、绕过否定contains防护或导致查询崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ash-project ash_sql 0.1.1-rc.10 ~ 0.7.1 cpe:2.3:a:ash-project:ash_sql:*:*:*:*:*:*:*:*
ash-project ash_sql cfc7da474c5be2190fd62664a83a689377a8d512 ~ d95c55c64b1b42cc2fd30211a4913f3145156cd4 cpe:2.3:a:ash-project:ash_sql:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-78691

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III. Intelligence Information for CVE-2026-78691

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Patches & Fixes for CVE-2026-78691 (1)

Vendor Advisories for CVE-2026-78691 (2)

Vendor Pages for CVE-2026-78691 (1)

Same Patch Batch · ash-project · 2026-08-30 · 20 CVEs total

CVE-2026-81636 8.7 HIGH Query-complexity limit bypass via first/last pagination arguments in AshGraphql enables de
CVE-2026-78699 7.2 HIGH rename_tenant returns :ok on a failed rename, enabling cross-tenant access in AshPostgres
CVE-2026-80223 7.1 HIGH Cross-tenant subscription disclosure in AshGraphql authorizes notifications in memory with
CVE-2026-78693 6.9 MEDIUM Incomplete redaction re-attaches the original error path in AshGraphql, leaking internal f
CVE-2026-81633 6.9 MEDIUM Unhandled KeyError in AshGraphql relay node resolution crashes queries via an unknown type
CVE-2026-77970 5.9 MEDIUM Sensitive fields nested in embedded values are not redacted in AshPaperTrail versions
CVE-2026-78038 5.9 MEDIUM Job argument injection via :args overrides primary_key and tenant in AshOban
CVE-2026-78228 5.9 MEDIUM Unbounded handle_error recursion enables denial of service in AshOban triggers
CVE-2026-77454 5.9 MEDIUM exists/2 predicate silently dropped on limited relationships with a parent() filter in Ash
CVE-2026-75847 5.9 MEDIUM Sensitive attribute values stored in a non-sensitive public changes map in AshPaperTrail
CVE-2026-81319 5.9 MEDIUM Unsafe deserialization of decrypted terms enables node DoS in AshCloak
CVE-2026-81643 2.3 LOW Broken access control in AshGraphql subscription batcher applies authorization suppression
CVE-2026-82367 2.3 LOW Re-entrant synchronous publish in AshGraphql subscription batcher delivers one subscriber'
CVE-2026-81316 2.1 LOW Same-named aggregates with differing filters are conflated in AshSql
CVE-2026-81322 2.1 LOW Cloaked plaintext leaks through a non-sensitive action argument in AshCloak
CVE-2026-80227 2.1 LOW SQL string_trim removes only spaces, diverging from in-memory trimming in AshSql
CVE-2026-81318 2.1 LOW Distinct-query aggregate drops the tenant schema prefix, leaking across tenants in AshSql
CVE-2026-77846 2.1 LOW JSON path injection via unescaped get_path segments in AshSqlite
CVE-2026-77831 2.1 LOW Algorithmic-complexity denial of service in AshPaperTrail full-diff list tracking

IV. Related Vulnerabilities

Same product: ash_sql
Same vendor: ash-project
Same weakness: CWE-943

V. Comments for CVE-2026-78691

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