CVE-2026-13713

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Source
https://cve.org/CVERecord?id=CVE-2026-13713
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-13713.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-13713
Downstream
ALPINE (1)
AZL (2)
BELL (1)
DEBIAN (1)
MGASA (1)
openSUSE (3)
RHSA (1)
RLSA (1)
UBUNTU (1)
Related
ALSA (1)
openSUSE (2)
Published
2026-07-16T21:35:31Z
Modified
2026-10-22T10:33:07Z
Severity
  • 6.2 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
YAML::Syck versions before 1.47 for Perl allow a use-after-free and double-free via an anchor node freed while still on the parser value stack
Details

YAML::Syck versions before 1.47 for Perl allow a use-after-free and double-free via an anchor node freed while still on the parser value stack.

In the bundled libsyck, when an anchor name is redefined or removed, syck_hdlr_add_anchor and syck_hdlr_remove_anchor free the node stored under that name with syck_free_node. That node can still be live on the parser's value stack, so syck_hdlr_add_node reaches it again and frees it a second time. On a normal build the 48-byte node chunk is freed twice and the interpreter aborts. Anchors need no special flags, so this is reached on the default Load path, and a 7-byte document that redefines an anchor triggers it.

Any caller that runs Load or LoadFile on an untrusted document that redefines an anchor mid-parse crashes the interpreter, a denial of service.

Database specific 
{
    "cna_assigner": "CPANSec",
    "cwe_ids": [
        "CWE-415",
        "CWE-416"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13713.json"
}
References

Affected packages

Git / github.com/cpan-authors/YAML-Syck

Affected ranges

Type
GIT
Repo
https://github.com/cpan-authors/YAML-Syck
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
d7f942870d2f57b17dd5db1b3714eff448c34cd6
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "1.47"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "fixed": "44c90a109ec3215ee7ce747bd11209835e123d8b"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

0.*
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.13
0.14
0.15
0.16
0.17
0.18
0.19
0.20
0.21
0.22
0.23
0.24
0.25
0.26
0.27
0.28
0.29
0.30
0.31
0.32
0.33
0.34
0.35
0.36
0.37
0.38
0.40
0.41
0.42
0.43
0.44
0.45
0.46_01
0.60
0.61
0.62
0.63
0.64
0.65
0.66
0.67
0.70
0.71
0.72
0.80
0.81
0.82
0.84
0.85
0.86
0.87
0.88
0.90
0.91
0.94
0.95
0.96
0.97
0.98
0.99
1.*
1.00
1.01
1.02
1.03
1.04
1.05
1.07
1.07_01
1.08
1.08_01
1.09
1.10
1.10_01
1.10_02
1.10_03
1.10_04
1.10_05
1.10_06
1.10_07
1.11
1.12
1.13
1.14
1.15
1.20
1.21_01
1.22
1.23
1.24_01
1.24_02
1.26
1.27
1.28
1.28_01
1.29_01
1.30
1.30_01
1.31
1.32
1.33
1.34
1.35
1.36
1.37
1.37_01
1.38
1.39
1.41
1.42
1.43
1.44
1.45
1.46
v1.*
v1.28
v1.28_01
v1.29_01
v1.30
v1.30_01
v1.31
v1.32
v1.33
v1.34
v1.35
v1.36
v1.37
v1.37_01

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-13713.json"