CVE-2026-58440

MEDIUM 6.8EPSS 0.3%

Webhooks created by a collaborator keep firing after their repo access is revoked → ongoing real-time exfiltration of private repo content (incomplete revocation cleanup in `DeleteCollaboration`)

CVSS v3.1: 6.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
CVSS v3.1: 6.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
EPSS: 0.28% chance of exploitation in the next 30 days, 20th percentile
Published: 2026-08-13
Updated: 2026-08-14

Proof-of-concept exploits (1)

advisories/GHSA-66m4-5jjr-2rg5

References

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