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CVE-2026-67354

guzzlehttp/guzzle versions before 7.15.1 contain an information disclosure vulnerability in RedirectMiddleware. When the optional allow_redirects.referer setting is enabled, the middleware copies the URI fragment (the portion after '#') from the referring request into the generated Referer header when following a same-scheme redirect (e.g., HTTPS to HTTPS). An attacker who controls the redirect destination can read this fragment from the incoming Referer header, potentially disclosing one-time l
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:173d2eeaf7f6516a968b33a58658503d1dc28b2e6262bf6d753bc3fe6c4b198b
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:cdaf79925a64ab0ab9b6e7c1b54270a6372c017a253b3bc69fbacdd79c4ef0d7 · sha256:8ea6d130c14c3620… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:cdaf79925a64ab0ab9b6e7c1b54270a6372c017a253b3bc69fbacdd79c4ef0d7 · sha256:8ea6d130c14c3620… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"guzzle","vendor":"guzzle","versions":[{"lessThan":"7.15.1","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"7.15.1","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdaf79925a64ab0ab9b6e7c1b54270a6372c017a253b3bc69fbacdd79c4ef0d7 · sha256:8ea6d130c14c3620… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:cdaf79925a64ab0ab9b6e7c1b54270a6372c017a253b3bc69fbacdd79c4ef0d7 · sha256:8ea6d130c14c3620… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:cdaf79925a64ab0ab9b6e7c1b54270a6372c017a253b3bc69fbacdd79c4ef0d7 · sha256:8ea6d130c14c3620… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-201","description":"Insertion of Sensitive Information Into Sent Data","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cdaf79925a64ab0ab9b6e7c1b54270a6372c017a253b3bc69fbacdd79c4ef0d7 · sha256:8ea6d130c14c3620… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"GitHub Security Advisory (GHSA-h95v-h523-3mw8)","tags":["vendor-advisory"],"url":"https://github.com/guzzle/guzzle/security/advisories/GHSA-h95v-h523-3mw8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cdaf79925a64ab0ab9b6e7c1b54270a6372c017a253b3bc69fbacdd79c4ef0d7 · sha256:8ea6d130c14c3620… · /containers/cna/references/0
{"name":"VulnCheck Advisory: guzzlehttp/guzzle before 7.15.1 URI Fragment Disclosure via Referer","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-uri-fragment-disclosure-via-referer"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cdaf79925a64ab0ab9b6e7c1b54270a6372c017a253b3bc69fbacdd79c4ef0d7 · sha256:8ea6d130c14c3620… · /containers/cna/references/1

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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