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Vulnerability details: VCID-4p99-5cwj-8fbn
Vulnerability ID VCID-4p99-5cwj-8fbn
Aliases CVE-2025-3777
GHSA-phhr-52qp-3mj4
Summary Transformers's Improper Input Validation vulnerability can be exploited through username injection Hugging Face Transformers versions up to 4.49.0 are affected by an improper input validation vulnerability in the `image_utils.py` file. The vulnerability arises from insecure URL validation using the `startswith()` method, which can be bypassed through URL username injection. This allows attackers to craft URLs that appear to be from YouTube but resolve to malicious domains, potentially leading to phishing attacks, malware distribution, or data exfiltration. The issue is fixed in version 4.52.1.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-20 Improper Input Validation
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 3.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-3777.json
epss 0.00055 https://api.first.org/data/v1/epss?cve=CVE-2025-3777
cvssv3.1 3.5 https://github.com/huggingface/transformers
generic_textual LOW https://github.com/huggingface/transformers
cvssv3.1 3.5 https://github.com/huggingface/transformers/blame/a7d2bbaaa8aac64f7c1ee8c1421cfe84b38359a4/src/transformers/image_utils.py
generic_textual LOW https://github.com/huggingface/transformers/blame/a7d2bbaaa8aac64f7c1ee8c1421cfe84b38359a4/src/transformers/image_utils.py
cvssv3 3.5 https://github.com/huggingface/transformers/commit/4dda5f71b35fb70cf602187eef84bb17a50b9082
cvssv3.1 3.5 https://github.com/huggingface/transformers/commit/4dda5f71b35fb70cf602187eef84bb17a50b9082
generic_textual LOW https://github.com/huggingface/transformers/commit/4dda5f71b35fb70cf602187eef84bb17a50b9082
ssvc Track https://github.com/huggingface/transformers/commit/4dda5f71b35fb70cf602187eef84bb17a50b9082
cvssv3 3.5 https://huntr.com/bounties/ccba0730-9248-4853-b7ff-5c20e6364f09
cvssv3.1 3.5 https://huntr.com/bounties/ccba0730-9248-4853-b7ff-5c20e6364f09
generic_textual LOW https://huntr.com/bounties/ccba0730-9248-4853-b7ff-5c20e6364f09
ssvc Track https://huntr.com/bounties/ccba0730-9248-4853-b7ff-5c20e6364f09
cvssv3.1 3.5 https://nvd.nist.gov/vuln/detail/CVE-2025-3777
generic_textual LOW https://nvd.nist.gov/vuln/detail/CVE-2025-3777
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-3777.json
https://api.first.org/data/v1/epss?cve=CVE-2025-3777
https://github.com/huggingface/transformers
https://github.com/huggingface/transformers/blame/a7d2bbaaa8aac64f7c1ee8c1421cfe84b38359a4/src/transformers/image_utils.py
https://github.com/huggingface/transformers/commit/4dda5f71b35fb70cf602187eef84bb17a50b9082
https://huntr.com/bounties/ccba0730-9248-4853-b7ff-5c20e6364f09
2376775 https://bugzilla.redhat.com/show_bug.cgi?id=2376775
CVE-2025-3777 https://nvd.nist.gov/vuln/detail/CVE-2025-3777
GHSA-phhr-52qp-3mj4 https://github.com/advisories/GHSA-phhr-52qp-3mj4
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-3777.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N Found at https://github.com/huggingface/transformers
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Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N Found at https://github.com/huggingface/transformers/blame/a7d2bbaaa8aac64f7c1ee8c1421cfe84b38359a4/src/transformers/image_utils.py
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Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N Found at https://github.com/huggingface/transformers/commit/4dda5f71b35fb70cf602187eef84bb17a50b9082
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Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N Found at https://github.com/huggingface/transformers/commit/4dda5f71b35fb70cf602187eef84bb17a50b9082
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Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-07-07T12:24:47Z/ Found at https://github.com/huggingface/transformers/commit/4dda5f71b35fb70cf602187eef84bb17a50b9082
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N Found at https://huntr.com/bounties/ccba0730-9248-4853-b7ff-5c20e6364f09
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Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N Found at https://huntr.com/bounties/ccba0730-9248-4853-b7ff-5c20e6364f09
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Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-07-07T12:24:47Z/ Found at https://huntr.com/bounties/ccba0730-9248-4853-b7ff-5c20e6364f09
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2025-3777
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Exploit Prediction Scoring System (EPSS)
Percentile 0.17646
EPSS Score 0.00055
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:24:19.022424+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/transformers/CVE-2025-3777.yml 38.6.0