CVE-2026-17543Public exploitNetwork attack vector

SQL injection via E-string backslash breakout

Published Jul 30, 2026 · Updated Jul 30, 2026

SQL injection in PHP ext-pgsql allows remote attackers to read or modify PostgreSQL data through crafted function parameters. php_pgsql_convert() uses PQescapeStringConn() and then wraps its output in an E-string literal, leaving a backslash able to escape the first doubled quote. Applications using affected pg_insert(), pg_update(), pg_select(), or pg_delete() calls are exposed when attacker-controlled values reach them.

CVSS severity9.8
Critical
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in PHP ext-pgsql allows remote attackers to read or modify PostgreSQL data through crafted function parameters. php_pgsql_convert() uses PQescapeStringConn() and then wraps its output in an E-string literal, leaving a backslash able to escape the first doubled quote. Applications using affected pg_insert(), pg_update(), pg_select(), or pg_delete() calls are exposed when attacker-controlled values reach them.

The record

CVE
CVE-2026-17543
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
The PHP Group
Product
PHP
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 30, 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=8.2.* <8.2.33
  2. Affected versionversion=8.3.* <8.3.33
  3. Affected versionversion=8.4.* <8.4.24
  4. Affected versionversion=8.5.* <8.5.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The PHP Group · PHPversion=8.2.* <8.2.33; version=8.3.* <8.3.33; version=8.4.* <8.4.24; version=8.5.* <8.5.9

Published CVSS scores

8.1PHP GroupCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

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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