Security readout for executives and security teams
Plain-English summary
CVE-2023-26137 affects drogonframework/drogon applications that place untrusted input into response headers or cookies. Attackers may be able to split an HTTP response and inject content. Business risk is highest for public-facing services using Drogon for authentication, redirects, cookies, or user-controlled header values.
Executive priority
Treat as a high-priority review for internet-facing Drogon services, especially where cookies or security-sensitive headers are built from user input. It is not confirmed as actively exploited in the supplied evidence, but the weakness can affect trust boundaries and web application integrity.
Technical view
The issue is CWE-113 HTTP Response Splitting in addHeader and addCookie when caller-supplied values are not sanitized. The CVSS 3.1 score is 7.2 high, network exploitable, unauthenticated, low complexity, with changed scope and limited confidentiality and integrity impact.
Likely exposure
Exposure is likely limited to applications built with drogonframework/drogon that pass user-controlled data into addHeader or addCookie. The supplied bundle reports all versions as vulnerable, but does not provide CPEs or a confirmed fixed version.
Exploitation context
The CVE is not listed as KEV, and the supplied sources do not state active exploitation. A public research gist is referenced, so defenders should assume technical details may be publicly available while avoiding assumptions about real-world exploitation.
Researcher notes
Focus on data flow from request parameters, headers, cookies, or database-backed user content into addHeader and addCookie. The supplied evidence is clear on the vulnerability class and affected functions, but incomplete on official remediation status and precise version boundaries.
Mitigation direction
- Review vendor and project guidance for a fixed release or official mitigation.
- Do not pass untrusted input directly into addHeader or addCookie.
- Reject or sanitize line breaks in response header and cookie values.
- Prioritize externally reachable Drogon services handling sessions, redirects, or cookies.
- Add regression tests for header and cookie value sanitization.
Validation and detection
- Inventory applications and dependencies using drogonframework/drogon.
- Search code paths using addHeader and addCookie with request-derived data.
- Confirm header and cookie values reject embedded line breaks.
- Review public-facing routes that reflect user input into response metadata.
- Verify tests cover unsafe input without exposing exploit details.
Public sources used
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-113: 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 lookupCVE-2023-26137 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
- High
- CVSS
- 7.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:P
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:C/C:L/I:L/A:N/E:P3.92.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:P
Source materials
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.
Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.