8.2

CVE-2026-23989: REVA Public Link Exploit

Analyzed
AliasesGHSA-9j2f-3rj3-wgpgGO-2026-4444openSUSE-SU-2026:10159-1
Published 06-02-2026Last modified 06-02-2026

Vulnerability summary

CVE-2026-23989 is a high (CVSS 8.2) Incorrect Authorization vulnerability in heinlein opencloud_reva. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 22.7% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 8.2 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
8.2/10
010
High · v3.1 (CVE.org)
EPSS score
0.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:0757-1

Timeline

  1. 06-02-2026
    PublishedVulnerability first disclosed.
  2. 06-02-2026
    Last modifiedVulnerability information updated.

Description

REVA is an interoperability platform. Prior to 2.42.3 and 2.40.3, a bug in the GRPC authorization middleware of the "Reva" component of OpenCloud allows a malicious user to bypass the scope verification of a public link. By exploiting this via the the "archiver" service this can be leveraged to create an archive (zip or tar-file) containing all resources that this creator of the public link has access to. This vulnerability is fixed in 2.42.3 and 2.40.3.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.30% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Github.com/opencloud-eu1 product
  • revaAll versions (No fix recorded)
Github.com/opencloud-eu/reva1 product
  • v2< 2.40.3 | ≥ 2.41.0, < 2.42.3
Heinlein1 product
Opencloud-eu1 product
  • reva< 2.40.3 | ≥ 2.41.0, < 2.42.3
Opensuse1 product
  • opencloud-server&distro=openSUSE Tumbleweed< 5.0.2-1.1

5 vendors · 5 products

References

5 links