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unslothai unsloth unsafe reflection via externally-controlled input

Priority MEDIUM 63CWE-470Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

Versions of unslothai unsloth from 0.1.501-beta before 0.1.902-beta are affected. In FastSentenceTransformer._is_transformer_module_ref, externally controlled input selects classes or code, which is unsafe reflection (CWE-470). A remote attacker with no privileges can trigger it when a user interacts with crafted input, with low impact to confidentiality, integrity and availability. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

A weakness has been identified in unslothai unsloth up to 0.1.501-beta. This affects the function FastSentenceTransformer._is_transformer_module_ref of the file unsloth/models/sentence_transformer.py. This manipulation of the argument Type causes use of externally-controlled input to select classes or code. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 0.1.902-beta is able to mitigate this issue. Patch name: de801746386a53a0cb26216e715a0af863b76ad9. The affected component should be upgraded.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00325 25th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Partial unsloth (unslothai): 0.1.902-betaRed Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
unslothaiunsloth0.1.501-beta0.1.902-betaPatch availableCNA
  • unsloth Vendorunslothai Affected 0.1.501-beta Fixed in 0.1.902-beta Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:unslothai:unsloth:*:*:*:*:*:*:*:*——unslothai
  • cpe:2.3:a:unslothai:unsloth:*:*:*:*:*:*:*:* Versions — — ·unslothai

Remediation

Upgrade unslothai unsloth to version 0.1.902-beta, which includes patch de801746386a53a0cb26216e715a0af863b76ad9. Red Hat rates this Important and lists Red Hat OpenShift AI (RHOAI) as affected without a fix, with no plan available.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA unsloth (unslothai) Fixed in 0.1.902-beta

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet
Not affected: 1 product
  • Red Hat OpenShift AI (RHOAI)

Timeline

  1. 2026-10-19 Threatist record created from CVE-2026-112075
  2. 2026-10-19 Affected versions changed · Red Hat
  3. 2026-10-19 CVSS score added · Red Hat
  4. 2026-10-19 Alias added: GHSA-fmj9-5fq7-mvjg
  5. 2026-10-19 CISA SSVC decision points changed
  6. 2026-10-19 Priority changed: LOW → MEDIUM
  7. 2026-10-21 Affected versions changed · Red Hat

References

  • TI-2026-62938 Unsloth Zoo Code Injection via model_type in config.json CVSS 4.0HIGH 8.6

Sources