9.8

CVE-2022-26133: atlassian bitbucket_data_center Deserialization of Untrusted Data

Modified
Published 20-04-2022Last modified 03-10-2024

Vulnerability summary

CVE-2022-26133 is a critical (CVSS 9.8) Deserialization of Untrusted Data vulnerability in atlassian bitbucket_data_center. EPSS estimates a 70.59% chance of exploitation in the next 30 days, higher than 99.3% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 71% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
70.59%
0%100%
Critical · +0.20 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 20-04-2022
    PublishedVulnerability first disclosed.
  2. 03-10-2024
    Last modifiedVulnerability information updated.

Description

SharedSecretClusterAuthenticator in Atlassian Bitbucket Data Center versions 5.14.0 and later before 7.6.14, 7.7.0 and later prior to 7.17.6, 7.18.0 and later prior to 7.18.4, 7.19.0 and later prior to 7.19.4, and 7.20.0 allow a remote, unauthenticated attacker to execute arbitrary code via Java deserialization.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

70.59%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

Increase +0.20 pp

From 70.39% 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.

Atlassian1 product
  • bitbucket_data_center≥ 5.14.0, < unspecified | ≥ unspecified, < 7.6.14 | ≥ 7.7.0, < unspecified | ≥ unspecified, < 7.17.6 | ≥ 7.18.0, < unspecified | ≥ unspecified, < 7.18.4 | ≥ 7.19.0, < unspecified | ≥ unspecified, < 7.19.4 | ≥ 5.14.0, < 7.6.14 | ≥ 7.7.0, < 7.17.6 | ≥ 7.18.0, < 7.18.4 | ≥ 7.19.0, < 7.19.4 | 7.20.0

1 vendor · 1 product

References

2 links