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    12 vulnerabilities by thumbor

    CVE-2026-53505 (GCVE-0-2026-53505)

    Vulnerability from nvd – Published: 2026-07-31 19:00 – Updated: 2026-07-31 19:00
    VLAI
    Title
    Thumbor proportion filter allows unbounded post-transform resize leading to remote DoS
    Summary
    Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:proportion(<value>) filter does not enforce an upper bound on <value> and runs in the post-transform phase. An attacker can trigger extremely large resizes (CPU/memory exhaustion) and cause denial of service. This issue is fixed in 7.8.0.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    CWE
    • CWE-400 - Uncontrolled Resource Consumption
    Assigner
    References
    Impacted products
    Vendor Product Version
    thumbor thumbor Affected: < 7.8.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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          "value": "Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor\u0027s filters:proportion(\u003cvalue\u003e) filter does not enforce an upper bound on \u003cvalue\u003e and runs in the post-transform phase. An attacker can trigger extremely large resizes (CPU/memory exhaustion) and cause denial of service. This issue is fixed in 7.8.0."
        }
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    CVE-2026-53504 (GCVE-0-2026-53504)

    Vulnerability from nvd – Published: 2026-07-31 18:57 – Updated: 2026-07-31 23:31
    VLAI
    Title
    Thumbor has Regex Denial of Service (ReDoS) in `convolution` filter
    Summary
    Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the convolution filter regular expression performs exponential backtracking on crafted repeated numeric input, allowing a URL request to exhaust processing time. This issue is fixed in 7.8.0.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-400 - Uncontrolled Resource Consumption
    Assigner
    References
    Impacted products
    Vendor Product Version
    thumbor thumbor Affected: < 7.8.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53503 (GCVE-0-2026-53503)

    Vulnerability from nvd – Published: 2026-07-31 18:54 – Updated: 2026-07-31 21:39
    VLAI
    Title
    Thumbor convolution filter allows divide-by-zero in C extension leading to remote DoS
    Summary
    Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:convolution(<matrix>, <columns>, <should_normalize>) filter passes the user-controlled <columns> value to a C extension (thumbor/ext/filters/_convolution.c) where it is used as a divisor (for % and /) without validating columns > 0. When columns=0, the C code triggers undefined behavior; on x86_64 this reliably results in a fatal divide-by-zero trap (SIGFPE) and crashes the Thumbor process, causing a remote denial of service. This issue is fixed in 7.8.0.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    thumbor thumbor Affected: < 7.8.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53502 (GCVE-0-2026-53502)

    Vulnerability from nvd – Published: 2026-07-31 19:03 – Updated: 2026-07-31 19:18
    VLAI
    Title
    Thumbor has path traversal via post-validation URL decoding bypass in file_loader
    Summary
    Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, file_loader decodes percent-encoded path segments after its root-boundary validation, allowing traversal outside FILE_LOADER_ROOT_PATH through watermark or frame filter input. This issue is fixed in 7.8.0.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
    Assigner
    References
    Impacted products
    Vendor Product Version
    thumbor thumbor Affected: < 7.8.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53501 (GCVE-0-2026-53501)

    Vulnerability from nvd – Published: 2026-07-31 18:42 – Updated: 2026-07-31 19:58
    VLAI
    Title
    Thumbor has HMAC validation bypass via multiple .replace() calls when removing URL signature
    Summary
    Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor’s HMAC validation can be bypassed due to the use of Python’s .replace() when removing the signature from the URL before validation. Since .replace() removes all occurrences of the substring, an attacker can insert the same signature multiple times in the URL and manipulate the final URL used for validation. This allows crafting URLs where the validated string differs from the actual requested resource, enabling loading images from unintended domains or paths. This issue is fixed in 7.8.0.
    Severity
    8.2 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-347 - Improper Verification of Cryptographic Signature
    Assigner
    References
    Impacted products
    Vendor Product Version
    thumbor thumbor Affected: < 7.8.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53500 (GCVE-0-2026-53500)

    Vulnerability from nvd – Published: 2026-07-31 18:35 – Updated: 2026-07-31 23:30
    VLAI
    Title
    Thumbor treats ALLOWED_SOURCES string patterns as unescaped regex, allowing hostname bypass via wildcard dot
    Summary
    Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the ALLOWED_SOURCES configuration passes plain strings to re.match() without escaping dots, so a hostname differing at dot positions can match the allowlist. This issue is fixed in 7.8.0.
    Severity
    8.2 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-918 - Server-Side Request Forgery (SSRF)
    Assigner
    References
    Impacted products
    Vendor Product Version
    thumbor thumbor Affected: < 7.8.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53502 (GCVE-0-2026-53502)

    Vulnerability from cvelistv5 – Published: 2026-07-31 19:03 – Updated: 2026-07-31 19:18
    VLAI
    Title
    Thumbor has path traversal via post-validation URL decoding bypass in file_loader
    Summary
    Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, file_loader decodes percent-encoded path segments after its root-boundary validation, allowing traversal outside FILE_LOADER_ROOT_PATH through watermark or frame filter input. This issue is fixed in 7.8.0.
    Severity
    8.7 (High)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
    Assigner
    References
    Impacted products
    Vendor Product Version
    thumbor thumbor Affected: < 7.8.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53505 (GCVE-0-2026-53505)

    Vulnerability from cvelistv5 – Published: 2026-07-31 19:00 – Updated: 2026-07-31 19:00
    VLAI
    Title
    Thumbor proportion filter allows unbounded post-transform resize leading to remote DoS
    Summary
    Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:proportion(<value>) filter does not enforce an upper bound on <value> and runs in the post-transform phase. An attacker can trigger extremely large resizes (CPU/memory exhaustion) and cause denial of service. This issue is fixed in 7.8.0.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    CWE
    • CWE-400 - Uncontrolled Resource Consumption
    Assigner
    References
    Impacted products
    Vendor Product Version
    thumbor thumbor Affected: < 7.8.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53504 (GCVE-0-2026-53504)

    Vulnerability from cvelistv5 – Published: 2026-07-31 18:57 – Updated: 2026-07-31 23:31
    VLAI
    Title
    Thumbor has Regex Denial of Service (ReDoS) in `convolution` filter
    Summary
    Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the convolution filter regular expression performs exponential backtracking on crafted repeated numeric input, allowing a URL request to exhaust processing time. This issue is fixed in 7.8.0.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-400 - Uncontrolled Resource Consumption
    Assigner
    References
    Impacted products
    Vendor Product Version
    thumbor thumbor Affected: < 7.8.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53503 (GCVE-0-2026-53503)

    Vulnerability from cvelistv5 – Published: 2026-07-31 18:54 – Updated: 2026-07-31 21:39
    VLAI
    Title
    Thumbor convolution filter allows divide-by-zero in C extension leading to remote DoS
    Summary
    Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor's filters:convolution(<matrix>, <columns>, <should_normalize>) filter passes the user-controlled <columns> value to a C extension (thumbor/ext/filters/_convolution.c) where it is used as a divisor (for % and /) without validating columns > 0. When columns=0, the C code triggers undefined behavior; on x86_64 this reliably results in a fatal divide-by-zero trap (SIGFPE) and crashes the Thumbor process, causing a remote denial of service. This issue is fixed in 7.8.0.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    thumbor thumbor Affected: < 7.8.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53501 (GCVE-0-2026-53501)

    Vulnerability from cvelistv5 – Published: 2026-07-31 18:42 – Updated: 2026-07-31 19:58
    VLAI
    Title
    Thumbor has HMAC validation bypass via multiple .replace() calls when removing URL signature
    Summary
    Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, Thumbor’s HMAC validation can be bypassed due to the use of Python’s .replace() when removing the signature from the URL before validation. Since .replace() removes all occurrences of the substring, an attacker can insert the same signature multiple times in the URL and manipulate the final URL used for validation. This allows crafting URLs where the validated string differs from the actual requested resource, enabling loading images from unintended domains or paths. This issue is fixed in 7.8.0.
    Severity
    8.2 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-347 - Improper Verification of Cryptographic Signature
    Assigner
    References
    Impacted products
    Vendor Product Version
    thumbor thumbor Affected: < 7.8.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-53500 (GCVE-0-2026-53500)

    Vulnerability from cvelistv5 – Published: 2026-07-31 18:35 – Updated: 2026-07-31 23:30
    VLAI
    Title
    Thumbor treats ALLOWED_SOURCES string patterns as unescaped regex, allowing hostname bypass via wildcard dot
    Summary
    Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the ALLOWED_SOURCES configuration passes plain strings to re.match() without escaping dots, so a hostname differing at dot positions can match the allowlist. This issue is fixed in 7.8.0.
    Severity
    8.2 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-918 - Server-Side Request Forgery (SSRF)
    Assigner
    References
    Impacted products
    Vendor Product Version
    thumbor thumbor Affected: < 7.8.0
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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