CVE-2021-39935

CRITICALNVD 6.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-02-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 6.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 36%CVSS: 6.8Exploit: cisa kev · ssvc active · epss top5pctExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.5 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. Unauthorized external users could perform Server Side Requests via the CI Lint API

CVSS v3
6.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
36%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

December 13, 2021

Last Modified

February 4, 2026

Advisory Details (3)

Auto-updated Jun 12, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39935
generic

SSRF patch for CI Lint API is incomplete (#346187) · Issues · GitLab.org / GitLab · GitLab

https://gitlab.com/gitlab-org/gitlab/-/issues/346187
generic

2021/CVE-2021-39935.json · master · GitLab.org / GitLab CVE assignments · GitLab

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39935.json

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 41× in last 7d / 216× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 442 total refreshes for this CVE.

  1. 2026-07-28 07:07 UTCGHSA enrichment
  2. 2026-07-28 03:04 UTCGHSA enrichment
  3. 2026-07-27 23:02 UTCGHSA enrichment
  4. 2026-07-27 19:24 UTCCISA KEV update
  5. 2026-07-27 18:58 UTCGHSA enrichment
  6. 2026-07-27 17:17 UTCCISA KEV update
  7. 2026-07-27 14:51 UTCGHSA enrichment
  8. 2026-07-27 10:28 UTCGHSA enrichment
  9. 2026-07-27 06:27 UTCGHSA enrichment
  10. 2026-07-27 02:24 UTCGHSA enrichment
  11. 2026-07-26 22:22 UTCGHSA enrichment
  12. 2026-07-26 18:19 UTCEG score recompute
  13. 2026-07-26 18:18 UTCGHSA enrichment
  14. 2026-07-26 14:52 UTCEPSS rescore
  15. 2026-07-26 14:52 UTCEPSS rescore
  16. 2026-07-26 14:15 UTCEG score recompute
  17. 2026-07-26 14:15 UTCGHSA enrichment
  18. 2026-07-26 10:12 UTCGHSA enrichment
  19. 2026-07-26 06:09 UTCGHSA enrichment
  20. 2026-07-26 02:03 UTCEG score recompute
  21. 2026-07-26 02:03 UTCGHSA enrichment
  22. 2026-07-25 14:15 UTCEPSS rescore
  23. 2026-07-24 14:15 UTCEPSS rescore
  24. 2026-07-23 02:04 UTCEG score recompute
  25. 2026-07-22 22:50 UTCEG score recompute
Show 75 more
  1. 2026-07-22 20:22 UTCGHSA enrichment
  2. 2026-07-22 19:40 UTCCISA KEV update
  3. 2026-07-22 16:19 UTCEG score recompute
  4. 2026-07-22 16:19 UTCGHSA enrichment
  5. 2026-07-22 14:06 UTCEPSS rescore
  6. 2026-07-22 12:16 UTCGHSA enrichment
  7. 2026-07-22 08:13 UTCGHSA enrichment
  8. 2026-07-22 04:11 UTCGHSA enrichment
  9. 2026-07-22 00:09 UTCGHSA enrichment
  10. 2026-07-21 20:07 UTCGHSA enrichment
  11. 2026-07-21 16:05 UTCEG score recompute
  12. 2026-07-21 16:05 UTCGHSA enrichment
  13. 2026-07-21 15:22 UTCEPSS rescore
  14. 2026-07-21 15:22 UTCEPSS rescore
  15. 2026-07-21 14:37 UTCCISA KEV update
  16. 2026-07-21 12:03 UTCGHSA enrichment
  17. 2026-07-21 08:00 UTCGHSA enrichment
  18. 2026-07-21 03:58 UTCGHSA enrichment
  19. 2026-07-20 23:56 UTCGHSA enrichment
  20. 2026-07-20 19:54 UTCEG score recompute
  21. 2026-07-20 19:54 UTCGHSA enrichment
  22. 2026-07-20 17:05 UTCEPSS rescore
  23. 2026-07-20 15:51 UTCGHSA enrichment
  24. 2026-07-20 11:49 UTCGHSA enrichment
  25. 2026-07-20 07:47 UTCGHSA enrichment
  26. 2026-07-20 03:44 UTCGHSA enrichment
  27. 2026-07-19 23:42 UTCGHSA enrichment
  28. 2026-07-19 19:40 UTCGHSA enrichment
  29. 2026-07-19 15:38 UTCEG score recompute
  30. 2026-07-19 15:38 UTCGHSA enrichment
  31. 2026-07-19 14:29 UTCEPSS rescore
  32. 2026-07-19 11:36 UTCGHSA enrichment
  33. 2026-07-19 07:34 UTCGHSA enrichment
  34. 2026-07-19 03:32 UTCGHSA enrichment
  35. 2026-07-18 23:30 UTCGHSA enrichment
  36. 2026-07-18 19:28 UTCGHSA enrichment
  37. 2026-07-18 15:26 UTCGHSA enrichment
  38. 2026-07-18 11:22 UTCEG score recompute
  39. 2026-07-18 11:22 UTCGHSA enrichment
  40. 2026-07-18 10:02 UTCEPSS rescore
  41. 2026-07-18 10:02 UTCEPSS rescore
  42. 2026-07-18 07:20 UTCGHSA enrichment
  43. 2026-07-18 03:18 UTCGHSA enrichment
  44. 2026-07-17 23:14 UTCGHSA enrichment
  45. 2026-07-17 19:12 UTCGHSA enrichment
  46. 2026-07-17 15:10 UTCGHSA enrichment
  47. 2026-07-17 11:08 UTCGHSA enrichment
  48. 2026-07-17 07:06 UTCEG score recompute
  49. 2026-07-17 07:06 UTCGHSA enrichment
  50. 2026-07-17 03:04 UTCGHSA enrichment
  51. 2026-07-16 23:02 UTCGHSA enrichment
  52. 2026-07-16 19:00 UTCGHSA enrichment
  53. 2026-07-16 17:04 UTCCISA KEV update
  54. 2026-07-16 17:00 UTCEPSS rescore
  55. 2026-07-16 17:00 UTCEPSS rescore
  56. 2026-07-16 14:58 UTCGHSA enrichment
  57. 2026-07-16 10:56 UTCGHSA enrichment
  58. 2026-07-16 06:54 UTCGHSA enrichment
  59. 2026-07-16 02:52 UTCGHSA enrichment
  60. 2026-07-15 22:50 UTCGHSA enrichment
  61. 2026-07-15 18:48 UTCGHSA enrichment
  62. 2026-07-15 16:55 UTCEPSS rescore
  63. 2026-07-15 16:55 UTCEPSS rescore
  64. 2026-07-15 16:49 UTCCISA KEV update
  65. 2026-07-15 15:04 UTCCISA KEV update
  66. 2026-07-15 14:46 UTCGHSA enrichment
  67. 2026-07-15 10:43 UTCGHSA enrichment
  68. 2026-07-15 06:40 UTCGHSA enrichment
  69. 2026-07-15 02:37 UTCGHSA enrichment
  70. 2026-07-15 01:58 UTCEPSS rescore
  71. 2026-07-14 22:34 UTCGHSA enrichment
  72. 2026-07-14 18:32 UTCGHSA enrichment
  73. 2026-07-14 18:05 UTCCISA KEV update
  74. 2026-07-14 14:31 UTCGHSA enrichment
  75. 2026-07-14 10:29 UTCGHSA enrichment

Frequently asked(6)

What is CVE-2021-39935?
CVE-2021-39935 is a critical vulnerability published on December 13, 2021. An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.5 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. Unauthorized external users could perform Server Side Requests via the CI Lint API
When was CVE-2021-39935 disclosed?
CVE-2021-39935 was first published in the National Vulnerability Database on December 13, 2021, with the most recent update on February 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-39935 actively exploited?
Yes. CISA added CVE-2021-39935 to the Known Exploited Vulnerabilities catalog on February 3, 2026, affecting GitLab Community and Enterprise Editions. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-39935?
CVE-2021-39935 has a CVSS v3 base score of 6.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-39935?
CVE-2021-39935 affects GitLab Community and Enterprise Editions. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2021-39935?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-39935, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2021-39935

Explore →

Is Your Infrastructure Affected by CVE-2021-39935?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs