CVE-2026-7541 (GCVE-0-2026-7541)

Vulnerability from cvelistv5 – Published: 2026-05-07 21:18 – Updated: 2026-05-08 13:44
VLAI?
Title
Denial of service vulnerability in GitHub Enterprise Server allowed service disruption via unauthenticated API endpoint
Summary
A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to cause service disruption by sending crafted requests with deeply nested JSON payloads to an unauthenticated API endpoint. The endpoint parsed user-controlled JSON request bodies without size or depth limits, causing excessive CPU and memory consumption. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.2, 3.19.6, 3.18.9, 3.17.15, and 3.16.18. This vulnerability was reported via the GitHub Bug Bounty program.
Severity ?
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U
CWE
  • CWE-770 - Allocation of resources without limits or throttling
Assigner
References
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.16.0 , ≤ 3.16.17 (semver)
Affected: 3.17.0 , ≤ 3.17.14 (semver)
Affected: 3.18.0 , ≤ 3.18.8 (semver)
Affected: 3.19.0 , ≤ 3.19.5 (semver)
Affected: 3.20.0 , ≤ 3.20.1 (semver)
Create a notification for this product.
Credits
Nguyen Nhat Anh (GitHub: anh2025)
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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