zedeus nitter Proxy Endpoint server-side request forgery

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.8$0-$5k1.24

Summaryinfo

A vulnerability identified as critical has been detected in zedeus nitter. This vulnerability affects unknown code of the component Proxy Endpoint. The manipulation leads to server-side request forgery. This vulnerability is listed as CVE-2026-56285. The attack may be initiated remotely. There is no available exploit. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in zedeus nitter (affected version not known). This issue affects some unknown functionality of the component Proxy Endpoint. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Nitter's /video media proxy endpoint fails to validate target URLs against Twitter/X domains and uses a hardcoded default HMAC key, allowing unauthenticated attackers to compute valid HMACs for arbitrary URLs. Attackers can retrieve HTTP responses from any host reachable by the server, including cloud metadata services and internal network resources.

The weakness was presented by George Chen as 1411. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-56285 since 06/20/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

Applying the patch 44b2f096f67da2cc257a0e262a94a7ae79e95d47 is able to eliminate this problem. The bugfix is ready for download at github.com.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.6
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 44b2f096f67da2cc257a0e262a94a7ae79e95d47

Timelineinfo

06/20/2026 CVE reserved
06/29/2026 +9 days Advisory disclosed
06/29/2026 +0 days VulDB entry created
06/29/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 1411
Researcher: George Chen
Status: Confirmed

CVE: CVE-2026-56285 (🔒)
GCVE (CVE): GCVE-0-2026-56285
GCVE (VulDB): GCVE-100-374663

Entryinfo

Created: 06/29/2026 20:31
Changes: 06/29/2026 20:31 (78)
Complete: 🔍
Cache ID: 216::103

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