fish-island-backend SSRF via /api/web/parse
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.
Summary
fish-island-backend through commit 7c61b78 is affected. An unauthenticated remote attacker can make the server fetch attacker-supplied URLs through the url parameter of GET /api/web/parse, a server-side request forgery flaw (CWE-918). Redirect-following requests can reach internal hosts, loopback services or cloud metadata endpoints, and the attacker can read back page titles, meta descriptions and favicons.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Description from the CNA
fish-island-backend through commit 7c61b78 contains an unauthenticated server-side request forgery vulnerability that allows remote attackers to make the server fetch attacker-supplied URLs via the url parameter of GET /api/web/parse. Attackers can target internal hosts, loopback services or cloud metadata endpoints through redirect-following OkHttp requests and read back page titles, meta descriptions and favicons.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
No affected products listed by the sources yet.
Remediation
The sources list no fixed version for fish-island-backend.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Timeline
- 2026-10-16 Threatist record created from CVE-2026-111720
- 2026-10-16 Alias added: GHSA-mc35-74mg-3v34
- 2026-10-18 Priority changed: MEDIUM → LOW
- 2026-10-19 CISA SSVC decision points changed
- 2026-10-19 Priority changed: LOW → HIGH
References
Other 3
- https://github.com/lhccong/fish-island-backend/blob/7c61b7861e99d3970beb34103c244b79e4de7d88/src/main/java/com/cong/fishisland/service/impl/chat/WebParserServiceImpl.java#L28-L45
- https://github.com/lhccong/fish-island-backend/blob/7c61b7861e99d3970beb34103c244b79e4de7d88/src/main/java/com/cong/fishisland/controller/chat/WebParserController.java#L13-L25
- https://github.com/lhccong/fish-island-backend/blob/7c61b7861e99d3970beb34103c244b79e4de7d88/src/main/java/com/cong/fishisland/config/CorsConfig.java#L33
Sources
- CVE-2026-111720 · CVE Program
- CVE-2026-111720 · NVD
- FIRST EPSS
- GHSA-mc35-74mg-3v34 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences