CVE-2026-4786

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Source
https://cve.org/CVERecord?id=CVE-2026-4786
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-4786.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-4786
Aliases
Downstream
ALPINE (1)
AZL (1)
BELL (1)
CGA (12)
CLSA (16)
DEBIAN (1)
MGASA (1)
MINI (5)
OESA (3)
openSUSE (7)
RHSA (36)
RLSA (14)
ROOT (1)
SUSE (22)
UBUNTU (1)
Related
ALSA (15)
openSUSE (7)
SUSE (22)
Published
2026-04-13T21:52:19Z
Modified
2026-10-16T02:57:53Z
Severity
  • 7.0 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Incomplete mitigation of CVE-2026-4519, %action expansion for command injection to webbrowser.open()
Details

Mitgation of CVE-2026-4519 was incomplete. If the URL contained "%action" the mitigation could be bypassed for certain browser types the "webbrowser.open()" API could have commands injected into the underlying shell. See CVE-2026-4519 for details.

Database specific 
{
    "cna_assigner": "PSF",
    "cwe_ids": [
        "CWE-77"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4786.json"
}
References

Affected packages

Git / github.com/python/cpython

Affected ranges

Type
GIT
Repo
https://github.com/python/cpython
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
3a19c2f0b3e91ce8f23d0cc64d4c9ee557823f24
Introduced
deaf509e8fc6e0363bd6f26d52ad42f976ec42f2
Fixed
41388c9cb160d0886d5ca00d2e6c8782608a4549
Introduced
0fb18b02c8ad56299d6a2910be0bab8ad601ef24
Fixed
2abcf904b8dac8c999d2b3aac76681abb333798a
Introduced
60403a5409ff2c3f3b07dd2ca91a7a3e096839c7
Fixed
fd17997c3866d61e0e7bd8201b1d8f35b40a40bd
Introduced
b092705907c758d4f9742028652c9802f9f03dd3
Fixed
a68a9190498a16ab1a5c9012ef5a70df81a5b328
Introduced
f31a89bb901067dd105b00cfa90523cf7ffdbbdd
Fixed
f31a89bb901067dd105b00cfa90523cf7ffdbbdd
Fixed
c5767a72838a8dda9d6dc5d3558075b055c56bca
Fixed
d22922c8a7958353689dc4763dd72da2dea03fff
Fixed
f4654824ae0850ac87227fb270f9057477946769
Fixed
28b4ad38067bbdad34edfcd03ad2de5f06387e53
Fixed
d6d68494be70bdbda20f89f83801ba52ec37daa4
Fixed
a4d3edf3a6ecfde504d02126410d2a65a859b744
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "3.10.21"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "3.11.0"
                },
                {
                    "fixed": "3.11.16"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "3.12.0"
                },
                {
                    "fixed": "3.12.14"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "3.13.0"
                },
                {
                    "fixed": "3.13.14"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "3.14.0a1"
                },
                {
                    "fixed": "3.14.5rc1"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "3.15.0a1"
                },
                {
                    "fixed": "3.15.0b1"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "fixed": "c5767a72838a8dda9d6dc5d3558075b055c56bca"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "d22922c8a7958353689dc4763dd72da2dea03fff"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "f4654824ae0850ac87227fb270f9057477946769"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "28b4ad38067bbdad34edfcd03ad2de5f06387e53"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "d6d68494be70bdbda20f89f83801ba52ec37daa4"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "a4d3edf3a6ecfde504d02126410d2a65a859b744"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

v0.*
v0.9.8
v0.9.9
v1.*
v1.0.1
v1.0.2
v1.1
v1.1.1
v1.2
v1.2b1
v1.2b2
v1.2b3
v1.2b4
v1.3
v1.3b1
v1.4
v1.4b1
v1.4b2
v1.4b3
v1.5
v1.5.1
v1.5.2
v1.5.2a1
v1.5.2a2
v1.5.2b1
v1.5.2b2
v1.5.2c1
v1.5a1
v1.5a2
v1.5a3
v1.5a4
v1.5b1
v1.5b2
v1.6a1
v1.6a2
v2.*
v2.0
v2.0b1
v2.0b2
v2.0c1
v2.1
v2.1a1
v2.1a2
v2.1b1
v2.1b2
v2.1c1
v2.1c2
v2.2a3
v2.3c1
v2.3c2
v2.4
v2.4a1
v2.4a2
v2.4a3
v2.4b1
v2.4b2
v2.4c1
v3.*
v3.0a1
v3.0a2
v3.0a3
v3.0a4
v3.0a5
v3.0b1
v3.0b2
v3.0b3
v3.0rc1
v3.0rc2
v3.0rc3
v3.1
v3.10.0a1
v3.10.0a7
v3.10.0b1
v3.10.0b2
v3.10.0b3
v3.10.0b4
v3.10.0rc1
v3.10.0rc2
v3.10.1
v3.10.10
v3.10.11
v3.10.12
v3.10.13
v3.10.14
v3.10.15
v3.10.16
v3.10.17
v3.10.18
v3.10.19
v3.10.2
v3.10.20
v3.10.3
v3.10.4
v3.10.5
v3.10.6
v3.10.7
v3.10.8
v3.10.9
v3.11.0a3
v3.11.0a4
v3.11.0a5
v3.11.0a6
v3.11.0a7
v3.11.0b1
v3.11.0b2
v3.11.0b3
v3.11.0b4
v3.11.0b5
v3.11.0rc1
v3.11.0rc2
v3.11.1
v3.11.10
v3.11.11
v3.11.12
v3.11.13
v3.11.14
v3.11.15
v3.11.2
v3.11.3
v3.11.4
v3.11.5
v3.11.6
v3.11.7
v3.11.8
v3.11.9
v3.12.0
v3.12.1
v3.12.10
v3.12.11
v3.12.12
v3.12.13
v3.12.2
v3.12.3
v3.12.4
v3.12.5
v3.12.6
v3.12.7
v3.12.8
v3.12.9
v3.13.0
v3.13.1
v3.13.10
v3.13.11
v3.13.12
v3.13.13
v3.13.2
v3.13.3
v3.13.4
v3.13.5
v3.13.6
v3.13.7
v3.13.8
v3.14.0
v3.14.0b1
v3.14.0b2
v3.14.0b3
v3.14.0b4
v3.14.0rc1
v3.14.0rc2
v3.14.0rc3
v3.14.1
v3.14.2
v3.14.3
v3.14.4
v3.15.0a1
v3.15.0a2
v3.15.0a3
v3.15.0a4
v3.15.0a5
v3.15.0a6
v3.15.0a7
v3.15.0a8
v3.1a1
v3.1a2
v3.1b1
v3.1rc1
v3.1rc2
v3.2a1
v3.2a2
v3.2a3
v3.2a4
v3.2b1
v3.2b2
v3.2rc1
v3.2rc2
v3.2rc3
v3.3.0a2
v3.3.0a3
v3.3.0a4
v3.3.0b1
v3.3.0b2
v3.3.0rc1
v3.3.0rc2
v3.3.0rc3
v3.4.0a1
v3.4.0a2
v3.4.0a3
v3.4.0a4
v3.4.0b1
v3.4.0b2
v3.4.0b3
v3.5.0a1
v3.5.0a2
v3.5.0a3
v3.5.0a4
v3.5.0b1
v3.6.0a3
v3.6.0b1
v3.7.0a2
v3.9.0a2

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-4786.json"