CVE Explorer

CVE-2026-55767

Guzzle is an extensible PHP HTTP client. Prior to 7.12.1, CookieJar incorrectly accepts cookies with a dot-only Domain attribute and whitespace-padded variants. SetCookie::matchesDomain() removes leading dots from the cookie domain, normalizing dot-only values to the empty string; SetCookie::validate() only rejected a strictly empty domain, so these cookies could be stored and the empty normalized domain was treated as matching any request host. An attacker-controlled origin that an application

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:22b9d173c690f0e28b8c79aeb25d272cb7b7b8149f800510b31689aa25b2b74a

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-346","description":"CWE-346: Origin Validation Error","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:247636290c7a8c314b81541335e5599221471435004193f46d38ce41715c339f · sha256:f5ee0f6288615040… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-1286","description":"CWE-1286: Improper Validation of Syntactic Correctness of Input","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:247636290c7a8c314b81541335e5599221471435004193f46d38ce41715c339f · sha256:f5ee0f6288615040… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"product":"guzzle","vendor":"guzzle","versions":[{"status":"affected","version":"< 7.12.1"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:247636290c7a8c314b81541335e5599221471435004193f46d38ce41715c339f · sha256:f5ee0f6288615040… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.8,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:247636290c7a8c314b81541335e5599221471435004193f46d38ce41715c339f · sha256:f5ee0f6288615040… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-346","description":"CWE-346: Origin Validation Error","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:247636290c7a8c314b81541335e5599221471435004193f46d38ce41715c339f · sha256:f5ee0f6288615040… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-1286","description":"CWE-1286: Improper Validation of Syntactic Correctness of Input","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:247636290c7a8c314b81541335e5599221471435004193f46d38ce41715c339f · sha256:f5ee0f6288615040… · /containers/cna/problemTypes/1/descriptions/0

Source references

1 source assertion

{"name":"https://github.com/guzzle/guzzle/security/advisories/GHSA-cwxw-98qj-8qjx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/guzzle/guzzle/security/advisories/GHSA-cwxw-98qj-8qjx"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:247636290c7a8c314b81541335e5599221471435004193f46d38ce41715c339f · sha256:f5ee0f6288615040… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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