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TI-2026-41065 Aliases CVE-2026-57075GHSA-fwh5-hwhp-qgp4

Out-of-bounds read in TODDR YAML::Syck

Priority MEDIUM 48CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
Partial Red Hat: 3 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

YAML::Syck versions before 1.47 for Perl allow an out-of-bounds read via a signed-char lookup-table index in syck_base64dec. The base64 decoder in the bundled libsyck indexes the 256-entry static table b64_xtable with a signed char, so any !!binary byte >= 0x80 sign-extends to a negative index and reads before the table. The decoder receives the raw bytes of any !!binary node, a standard YAML type not gated by $LoadBlessed or $LoadCode, so it is reached on the default Load path. Any caller that runs Load or LoadFile on an untrusted document containing a !!binary scalar with a high-bit byte triggers the read, and the value read can surface in the decoded result.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00632 50th percentileScored 2026-11-07
Fix Partial YAML::Syck (TODDR): 1.47Red Hat: 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TODDRYAML::Syckbefore 1.471.47Patch availableCNA
  • YAML::Syck VendorTODDR Affected before 1.47 Fixed in 1.47 Patch available CNA

Remediation

  • Fix · CNA YAML::Syck (TODDR) Fixed in 1.47

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    TODDR YAML::Syck 1.47

    4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW

    Other records, highest priority first

    Show all 4 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-57075
  2. 2026-10-03 Alias added: GHSA-fwh5-hwhp-qgp4
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Patch 1

Other 1

  • TI-2026-04444 YAML::Syck versions before 1.38 for Perl has an out-of-bounds read CVSS 3.1HIGH 7.3
  • TI-2006-06994 Heap-based buffer overflow in TODDR XML::Parser CVSS 3.1CRITICAL 9.8
  • TI-2006-06993 Heap-based buffer overflow in TODDR XML::Parser CVSS 3.1CRITICAL 9.8
  • TI-2026-03625 Heap-based buffer overflow in TODDR YAML::Syck CVSS 3.1CRITICAL 9.1
  • TI-2026-41067 Out-of-bounds read in TODDR YAML::Syck CVSS 3.1HIGH 7.7
  • TI-2026-41066 Use after free in TODDR YAML::Syck CVSS 3.1HIGH 7.8
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences