How severe is CVE-2020-7659?

CVE-2020-7659 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-7659 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-7659?

CVE-2020-7659 affects Celluloid Reel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-7659?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-7659 published?

CVE-2020-7659 was published on 2020-06-01 and last updated on 2026-06-17.

CVE-2020-7659

CVE-2020-7659 is a high-severity vulnerability in Celluloid Reel with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-444.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-444
Affected product: Celluloid Reel
Published: 2020-06-01
Last modified: 2026-06-17

Description

reel through 0.6.1 allows Request Smuggling attacks due to incorrect Content-Length and Transfer encoding header parsing. It is possible to conduct HTTP request smuggling attacks by sending the Content-Length header twice. Furthermore, invalid Transfer Encoding headers were found to be parsed as valid which could be leveraged for TE:CL smuggling attacks. Note: This project is deprecated, and is not maintained any more.

Frequently asked questions

What is CVE-2020-7659?: reel through 0.6.1 allows Request Smuggling attacks due to incorrect Content-Length and Transfer encoding header parsing. It is possible to conduct HTTP request smuggling attacks by sending the Content-Length header twice. Furthermore, invalid Transfer Encoding headers were found to be parsed as valid which could be leveraged for TE:CL smuggling attacks. Note: This project is deprecated, and is not maintained any more.
How severe is CVE-2020-7659?: CVE-2020-7659 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-7659 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-7659?: CVE-2020-7659 affects Celluloid Reel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-7659?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-7659 published?: CVE-2020-7659 was published on 2020-06-01 and last updated on 2026-06-17.

References

https://snyk.io/vuln/SNYK-RUBY-REEL-569135

Affected products (1)

cpe:2.3:a:celluloid:reel:*:*:*:*:*:*:*:*

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