CVE-2026-59883
CVE-2026-59883: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityMedium4.7
Medium [CVE-2026-59883] Cross-host cookie disclosure and injection due to improper domain matching in CookieJar.
CVE-2026-59883Source published Source updated
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. This vulnerability could allow a remote attacker to disclose cookies across different hosts, inject malicious cookies, or fixate user sessions, potentially leading to unauthorized access or session hijacking. Red Hat's products are not affected by this flaw because the guzzlehttp/guzzle PHP library is not shipped in any Red Hat product. Red Hat severity: Moderate — CVSS 4.7…
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- < 7.12.3
- < 192.168.0.1
- Source-reported fixed versions
- 7.12.3
- Mitigation guidance
- Use a separate CookieJar instance per host or trust boundary. Do not store cookies scoped to IP-address or bare-numeric domains in a shared jar.
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