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CVE-2026-4271

A flaw was found in libsoup, a library for handling HTTP requests. This vulnerability, known as a Use-After-Free, occurs in the HTTP/2 server implementation. A remote attacker can exploit this by sending specially crafted HTTP/2 requests that cause authentication failures. This can lead to the application attempting to access memory that has already been freed, potentially causing application instability or crashes, resulting in a Denial of Service (DoS).
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a59ac546cde37699bbbab62996d4884c1c89b6fb80d5826c4bf7704cc5533564
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 7 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"libsoup","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/4

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","packageName":"libsoup3","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:3.6.5-3.el10_2.11","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"libsoup","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/5

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"libsoup","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/6

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.1"],"defaultStatus":"affected","packageName":"libsoup3","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:3.6.5-3.el10_1.11","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"affected","packageName":"libsoup","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/3

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"defaultStatus":"affected","packageName":"libsoup3","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:3.6.5-3.el10_0.15","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/2

Affected products and versions

7 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"libsoup","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/4
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","packageName":"libsoup3","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:3.6.5-3.el10_2.11","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"libsoup","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/5
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"libsoup","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/6
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.1"],"defaultStatus":"affected","packageName":"libsoup3","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:3.6.5-3.el10_1.11","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"affected","packageName":"libsoup","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/3
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"defaultStatus":"affected","packageName":"libsoup3","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:3.6.5-3.el10_0.15","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/affected/2

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-416","description":"Use After Free","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/problemTypes/0/descriptions/0

Source references

7 source assertions
{"name":"RHSA-2026:15968","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:15968"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/references/0
{"name":"RHSA-2026:17482","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:17482"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/references/1
{"name":"RHSA-2026:19143","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:19143"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/references/2
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-4271"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/references/3
{"name":"RHBZ#2448044","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2448044"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/references/4
{"tags":["exploit"],"url":"https://gitlab.gnome.org/GNOME/libsoup/-/issues/496"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/adp/0/references/0
{"url":"https://gitlab.gnome.org/GNOME/libsoup/-/issues/496"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:502c8d0ca812b38b5ca95110a0979f14fca5c54d958505b3f006495e22ee0efc · sha256:0dd9caaa1a3655b9… · /containers/cna/references/5

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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