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01 Record

CVE-2026-66877

Gitea fork workflow approval bypass through concurrency cancellation

HighPUBLISHEDCNA: Gitea
CNA base score8.1 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
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02 Description

Gitea fork workflow approval bypass through concurrency cancellation

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.42% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 36.6% of scored records. A rank, not a probability.
NVD base score
8.1 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD analysis status
Deferred. NVD last modified this record on 2026-10-15.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-14 14:36Z14 DAYS AGO
Last updated
2026-10-15 03:56Z14 DAYS AGO
Reserved
2026-08-13
Assigning CNA
Gitea
Record state
PUBLISHED
Severity
High (CVSS 8.1)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weaknesses
  • CWE-284Improper Access ControlPillar
Data version
5.2
Document digest
c5e0bd386be5e40c2b5c46756c339c11d7af16c7b14e5b084c4d0c3e5a82d5ad

05 Affected products

VendorProductVersionsPlatforms
GiteaGitea0 to 1.27.2—

06 References