Security readout for executives and security teams
Plain-English summary
This flaw affects several self-managed Atlassian products and can let an unauthenticated remote attacker bypass servlet filters. Depending on how an app uses those filters, consequences may include authentication bypass or cross-site scripting. Atlassian released updates addressing the root cause, but the full impact varies by product and app configuration.
Executive priority
Treat this as a priority remediation item for self-managed Atlassian infrastructure. It can affect core collaboration and development platforms, requires no attacker login, and may bypass authentication-related controls depending on local app usage.
Technical view
CVE-2022-26136 is a CWE-180 canonicalization issue in multiple Atlassian products. It has CVSS 9.8 with network attack vector, low complexity, no privileges, and no user interaction. Affected servlet filter bypass can undermine first-party or third-party app controls, potentially causing auth bypass or XSS.
Likely exposure
Exposure is likely where organizations run affected Server or Data Center versions of Bamboo, Bitbucket, Confluence, Crowd, Jira, Jira Service Management, Fisheye, or Crucible, especially on internet-facing systems.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability is still high urgency because exploitation is remote, unauthenticated, low complexity, and can affect authentication or browser-side trust boundaries.
Researcher notes
Atlassian says impact depends on which filters each app uses and how they are used, and it has not exhaustively enumerated all consequences. Avoid assuming a uniform exploit path across products; validate exposure by product version, installed apps, and filter-dependent security controls.
Mitigation direction
- Inventory all self-managed Atlassian products and versions against the affected ranges.
- Upgrade affected products to Atlassian fixed versions listed for each product family.
- Prioritize internet-facing, SSO-adjacent, and business-critical Atlassian deployments.
- Review third-party apps that rely on servlet filters for authentication or access control.
- If upgrade timing is blocked, check the Atlassian issue pages for product-specific guidance.
Validation and detection
- Confirm each Atlassian instance product name, deployment type, and exact version.
- Map versions to the affected ranges in the CVE description and Atlassian issues.
- Verify upgraded instances are at or above the fixed release for that product branch.
- Check access logs for suspicious unauthenticated requests to sensitive Atlassian routes.
- Review app configurations that depend on servlet filters for security decisions.
Public sources used
- CVE Program
- CVE List V5
- Atlassian Bamboo issue BAM-21795
- Atlassian Bitbucket issue BSERV-13370
- Atlassian Confluence issue CONFSERVER-79476
- Atlassian Crowd issue CWD-5815
- Atlassian Fisheye issue FE-7410
- Atlassian Crucible issue CRUC-8541
- Atlassian Jira issue JRASERVER-73897
- Atlassian Jira Service Management issue JSDSERVER-11863
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-180: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2022-26136 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://jira.atlassian.com/browse/BAM-21795CVE reference · x_refsource_MISC
- https://jira.atlassian.com/browse/BSERV-13370CVE reference · x_refsource_MISC
- https://jira.atlassian.com/browse/CONFSERVER-79476CVE reference · x_refsource_MISC
- https://jira.atlassian.com/browse/CWD-5815CVE reference · x_refsource_MISC
- https://jira.atlassian.com/browse/FE-7410CVE reference · x_refsource_MISC
- https://jira.atlassian.com/browse/CRUC-8541CVE reference · x_refsource_MISC
- https://jira.atlassian.com/browse/JRASERVER-73897CVE reference · x_refsource_MISC
- https://jira.atlassian.com/browse/JSDSERVER-11863CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Incorrect Behavior Order: Validate Before Canonicalize
Incorrect Behavior Order: Validate Before Canonicalize represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.