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    CVE-2026-59883

    Guzzle is an extensible PHP HTTP client. Prior to 7.12.3, CookieJar did not restrict cookies scoped to IP-address or bare-numeric Domain values to the exact host that set them, because SetCookie::matchesDomain() applied ordinary suffix matching to domains such as 192.168.0.1, [::1], or 1, allowing cross-host cookie disclosure, cookie injection, or session fixation. This issue is fixed in version 7.12.3.

    Published:Jul 8, 2026
    Last Modified:Jul 10, 2026
    EPS:Jul 8, 2026
    EPSS Score:0.00115
    CVSS Score:4.7

    Affected Products

    Vendor
    Guzzlephp
    Product
    Guzzle

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-111 JSON Hijacking (aka JavaScript Hijacking)
    CAPEC-141 Cache Poisoning
    CAPEC-142 DNS Cache Poisoning
    CAPEC-160 Exploit Script-Based APIs
    CAPEC-196 Session Credential Falsification through Forging
    CAPEC-21 Exploitation of Trusted Identifiers
    CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies
    CAPEC-384 Application API Message Manipulation via Man-in-the-Middle
    CAPEC-385 Transaction or Event Tampering via Application API Manipulation
    CAPEC-386 Application API Navigation Remapping
    CAPEC-387 Navigation Remapping To Propagate Malicious Content
    CAPEC-388 Application API Button Hijacking
    CAPEC-39 Manipulating Opaque Client-based Data Tokens
    CAPEC-510 SaaS User Request Forgery
    CAPEC-59 Session Credential Falsification through Prediction
    CAPEC-60 Reusing Session IDs (aka Session Replay)
    CAPEC-61 Session Fixation
    CAPEC-75 Manipulating Writeable Configuration Files
    CAPEC-76 Manipulating Web Input to File System Calls
    CAPEC-89 Pharming

    Related CVEs

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    CVE-2026-69245 (CVSS 6.5) — Guzzle is an extensible PHP HTTP client. Prior to 7.15.2 and 8.0.1, SetCookie::matchesDomain() gives every sub…
    CVE-2026-67354 (CVSS 8.2) — guzzlehttp/guzzle versions before 7.15.1 contain an information disclosure vulnerability in RedirectMiddleware…
    CVE-2026-67355 (CVSS 8.2) — guzzlehttp/guzzle versions before 7.15.1 fail to preserve host-only cookie scope, storing the request host in …
    CVE-2026-67353 (CVSS 6.9) — guzzlehttp/guzzle versions before 7.15.1 contain a denial of service vulnerability in the CookieJar that accep…
    CVE-2026-67339 (CVSS 6.9) — guzzlehttp/guzzle versions before 7.14.2 fail to properly isolate Proxy-Authorization headers from origin serv…
    CVE-2026-55767 (CVSS 5.8) — Guzzle is an extensible PHP HTTP client. Prior to 7.12.1, CookieJar incorrectly accepts cookies with a dot-onl…
    CVE-2026-55568 (CVSS 5.9) — Guzzle is an extensible PHP HTTP client. Prior to 7.12.1, in certain configurations, traffic expected to be pr…
    CVE-2022-31090 (CVSS 7.7) — Guzzle, an extensible PHP HTTP client. `Authorization` headers on requests are sensitive information. In affec…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High