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CVE-2026-48979

PHP Standard Library (PSL) is set of APIs covering async, collections, networking, I/O, cryptography, terminal UI, etc. In versions 6.1.0, 6.1.1 and 6.2.0, the Psl\H2\ServerConnection does not validate that the total bytes received in DATA frames match the content-length header declared in the HEADERS frame, allowing request smuggling. This is in violation of RFC 9113 §8.1.1. A malicious client is able to send more DATA bytes than declared, smuggling additional content past application-level siz
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a50c8754bc2e935a7737b073511a73e36ff671cc0421c591d721be9f0d7015b0
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"product":"php-standard-library/h2","vendor":"php-standard-library","versions":[{"status":"affected","version":">= 6.1.0, < 6.1.2"},{"status":"affected","version":">= 6.2.0, < 6.2.1"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f9d5231c2c10259bbc2decab0c6ced9e68a9e8770add31ca1b034fe22e9e4af4 · sha256:4746b364d3fb04cd… · /containers/cna/affected/1

{"product":"php-standard-library","vendor":"php-standard-library","versions":[{"status":"affected","version":">= 6.1.0, < 6.1.2"},{"status":"affected","version":">= 6.2.0, < 6.2.1"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f9d5231c2c10259bbc2decab0c6ced9e68a9e8770add31ca1b034fe22e9e4af4 · sha256:4746b364d3fb04cd… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"product":"php-standard-library/h2","vendor":"php-standard-library","versions":[{"status":"affected","version":">= 6.1.0, < 6.1.2"},{"status":"affected","version":">= 6.2.0, < 6.2.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f9d5231c2c10259bbc2decab0c6ced9e68a9e8770add31ca1b034fe22e9e4af4 · sha256:4746b364d3fb04cd… · /containers/cna/affected/1
{"product":"php-standard-library","vendor":"php-standard-library","versions":[{"status":"affected","version":">= 6.1.0, < 6.1.2"},{"status":"affected","version":">= 6.2.0, < 6.2.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f9d5231c2c10259bbc2decab0c6ced9e68a9e8770add31ca1b034fe22e9e4af4 · sha256:4746b364d3fb04cd… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f9d5231c2c10259bbc2decab0c6ced9e68a9e8770add31ca1b034fe22e9e4af4 · sha256:4746b364d3fb04cd… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-444","description":"CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f9d5231c2c10259bbc2decab0c6ced9e68a9e8770add31ca1b034fe22e9e4af4 · sha256:4746b364d3fb04cd… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/php-standard-library/php-standard-library/releases/tag/6.1.2","tags":["x_refsource_MISC"],"url":"https://github.com/php-standard-library/php-standard-library/releases/tag/6.1.2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f9d5231c2c10259bbc2decab0c6ced9e68a9e8770add31ca1b034fe22e9e4af4 · sha256:4746b364d3fb04cd… · /containers/cna/references/1
{"name":"https://github.com/php-standard-library/php-standard-library/releases/tag/6.2.1","tags":["x_refsource_MISC"],"url":"https://github.com/php-standard-library/php-standard-library/releases/tag/6.2.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f9d5231c2c10259bbc2decab0c6ced9e68a9e8770add31ca1b034fe22e9e4af4 · sha256:4746b364d3fb04cd… · /containers/cna/references/2
{"name":"https://github.com/php-standard-library/php-standard-library/security/advisories/GHSA-pw9p-jvrm-f7rm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/php-standard-library/php-standard-library/security/advisories/GHSA-pw9p-jvrm-f7rm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f9d5231c2c10259bbc2decab0c6ced9e68a9e8770add31ca1b034fe22e9e4af4 · sha256:4746b364d3fb04cd… · /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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