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Stored HTML injection in Coder appearance settings

Priority LOW 21CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Coder before 2.29.17, 2.30.0 before 2.32.7, 2.33.0 before 2.33.8, and 2.34.0 before 2.34.2 is affected. The ApplicationName and LogoURL appearance settings are rendered into HTML without sufficient escaping (CWE-79). An attacker with the Owner role can store HTML that renders in the Coder dashboard and in SMTP notification emails sent to other users.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Coder before 2.29.17, 2.30.0 before 2.32.7, 2.33.0 before 2.33.8, and 2.34.0 before 2.34.2 contains a stored HTML injection vulnerability because the ApplicationName and LogoURL appearance settings are rendered into HTML output without sufficient escaping. Attackers with the Owner role can store HTML markup in these settings that renders in the Coder dashboard and in SMTP notification emails sent to other deployment users.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00167 5th percentileScored 2026-11-07
Fix Fixed coder (coder): 2.34.2, 2.33.8, 2.32.7 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
codercoder2.34.0 to before 2.34.22.34.2Patch availableCNA
codercoder2.33.0 to before 2.33.82.33.8Patch availableCNA
codercoder2.30.0 to before 2.32.72.32.7Patch availableCNA
codercoderbefore 2.29.172.29.17Patch availableCNA
  • coder Vendorcoder Affected 2.34.0 to before 2.34.2 Fixed in 2.34.2 Patch available CNA
  • coder Vendorcoder Affected 2.33.0 to before 2.33.8 Fixed in 2.33.8 Patch available CNA
  • coder Vendorcoder Affected 2.30.0 to before 2.32.7 Fixed in 2.32.7 Patch available CNA
  • coder Vendorcoder Affected before 2.29.17 Fixed in 2.29.17 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:*——coder
  • cpe:2.3:a:coder:coder:*:*:*:*:*:*:*:* Versions — — ·coder

Remediation

Fixed versions for coder are 2.29.17, 2.32.7, 2.33.8 and 2.34.2. Upgrade to the fixed version of the release line in use.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA coder (coder) Fixed in 2.34.2
  • Fix · CNA coder (coder) Fixed in 2.33.8
  • Fix · CNA coder (coder) Fixed in 2.32.7
  • Fix · CNA coder (coder) Fixed in 2.29.17

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    coder 2.29.17, 2.32.7 and 2 more versions

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-76138 User enumeration via login placeholder hash in CoderPriority LOW 27

Timeline

  1. 2026-10-18 Threatist record created from CVE-2026-111932
  2. 2026-10-18 Alias added: GHSA-7cmx-x3cj-5mp3
  3. 2026-10-22 CISA SSVC decision points changed

References

  • TI-2025-29799 code-server session cookie can be extracted by having user visit specially crafted proxy URL CVSS 3.1HIGH 8.3
  • TI-2025-37344 AgentAPI exposed user chat history via a DNS rebinding attack CVSS 3.1MEDIUM 6.5
  • TI-2026-34071 Coder: PKCS#7 signature bypass in Azure instance identity allows unauthenticated agent token theft CVSS 3.1CRITICAL 9.1
  • TI-2026-32394 Coder vulnerable to workspace auto-creation via crafted URL parameters without user consent CVSS 3.1HIGH 8.8
  • TI-2026-27585 Code Extension Marketplace has a Zip Slip Path Traversal CVSS 4.0HIGH 8.7
  • TI-2024-18523 Coder's OIDC authentication allows email with partially matching domain to register CVSS 3.1HIGH 8.2
See all 42 →

Sources