Vulnerability in guzzlehttp/guzzle (CVE-2026-69245)
Summary
Vulnerability in guzzlehttp/guzzle (CVE-2026-69245). Risk of unauthorized operations or information disclosure. Exploitable via Domain. Mitigation: upgrade to 7.15.2 or later.
Original description
The description as published by the source.
Impact
SetCookie::matchesDomain() gives every subdomain of a cookie Domain that cookie unless it recognizes the Domain as an IP literal or a numeric host, and it decides that from the domain's own text, so two spellings a transport reads as an address keep subdomain scope. On 7.15, hexadecimal and mixed-base forms such as 0x7f000001 and 0177.0.0.0x1 go unrecognized while libcurl 8.21.0 reads both as 127.0.0.1, so closing them completes the rule GHSA-g446-98w2-8p5w (CVE-2026-59883) set out to establish, which cited the WHATWG IPv4 parser and so already admitted a 0x part. A percent-escaped Domain keeps that scope on both branches for a different reason: percent-decoding sits above numeric parsing, so 192.168.0.%31 and 127.0.0.1%2e are registered names in the URI grammar rather than address literals, and no numeric rule in any base classifies them, while libcurl decodes the host before it resolves and reads them as 192.168.0.1 and 127.0.0.1. The escape must fall in the rightmost label on 8.0.0, which already catches a decimal, octal or 0x part there, but not on 7.15, where %31%32%37.0.0.0x1 also reads as 127.0.0.1; 8.0.0 is affected in the percent spelling alone.
Both directions of the defect are reproduced over a real socket. A cookie stored for Domain=0x7f000001 is placed in the Cookie header of a request to evil.0x7f000001, disclosing a session identifier or token to a host that is not that address, and a response from `e…
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-69245 has been found in guzzlehttp/guzzle.
Attackers can target a specific entry point like Domain over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 6.5/10.
What to do: upgrade guzzlehttp/guzzle to 7.15.2 or later.
If unsure, ask your IT team or search "guzzlehttp/guzzle CVE-2026-69245" on the vendor's site.
CVE-2026-69245 (guzzlehttp/guzzle) — CWE-180 / CVSS v3 6.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: Domain / Cookie / evil.0x7f000001 / CookieJar
Patched: 7.15.2 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-180) exists in guzzlehttp/guzzle. Attackers reach the vulnerable code path via Domain without authentication.
Check the vendor advisory for the affected versions of guzzlehttp/guzzle. Attack surface: Domain / Cookie / evil.0x7f000001 / CookieJar.
Severity: Medium (CVSS 6.5/10). Risk of unauthorized operations or information disclosure.
Update to 7.15.2.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'guzzlehttp/guzzle' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'guzzlehttp/guzzle' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
guzzlehttp/guzzleを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade guzzlehttp/guzzle to 7.15.2ステージング環境で 7.15.2 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-69245 guzzle
- Ubuntu UBUNTU-CVE-2026-69245 guzzle