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Fencer Vulns
medium 5.9

CVE-2023-20902 json

Timing attack risk in Harbor

published 2023-10-10 3 y ago modified 2026-09-08 2 mo ago also BIT-harbor-2023-20902 , EUVD-2023-2779 , GHSA-mq6f-5xh5-hgcf , GO-2023-2109

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

A timing condition in Harbor 2.6.x and below, Harbor 2.7.2 and below,  Harbor 2.8.2 and below, and Harbor 1.10.17 and below allows an attacker with network access to create jobs/stop job tasks and retrieve job task information.

Patch / fix

  • go github.com/goharbor/harbor 1.10.18, 2.7.3, 2.7.3+incompatible, 2.8.3, 2.8.3+incompatible
  • bitnami harbor 1.10.17, 2.6.5, 2.7.3, 2.8.3
  • linuxfoundation harbor 1.10.17, 2.7.3, 2.8.3

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/goharbor/harbor/security/advisories/GHSA-mq6f-5xh5-hgcf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

Affected packages

ecosystem package affected fixed in
go github.com/goharbor/harbor
<1.10.18
>=2.0.0, <2.7.3
>=2.8.0, <2.8.3
>=2.0.0+incompatible, <2.7.3+incompatible
>=2.8.0+incompatible, <2.8.3+incompatible
1.10.18
2.7.3
2.8.3
2.7.3+incompatible
2.8.3+incompatible
bitnami harbor
<1.10.17
>=2.6.0, <2.6.5
>=2.7.0, <2.7.3
>=2.8.0, <2.8.3
1.10.17
2.6.5
2.7.3
2.8.3

Affected products

  • Harbor Project

Classification

Weakness
  • CWE-208 Observable Timing Discrepancy
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.