CVE-2026-59341

MEDIUMPre-NVD 4.24.2
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 4.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (34th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated

Also known asEUVD-2026-78349 (ENISA EUVD)Source: ENISA EUVD

4.2EG
EchelonGraph verdictPlan mitigationNo fix is confirmed yet: check with the vendor for a fixed release; until one is applied, restrict network exposure of the affected system on your normal schedule (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.2Exploit: No code on recordExposed services: Not assessed

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

The CVE record's CNA (VMware by Broadcom) lists Bitnami sealed-secrets versions up to and including 0.38.4 as affected, and Bitnami sealed-secrets versions 0.40.0 as unaffected. No release containing a fix is confirmed on record.

A security vulnerability exists in the Sealed Secrets controller's unauthenticated POST endpoints. By submitting a modified payload containing custom Go template logic in spec.template.data, an attacker with internal network access can abuse the handler as a decryption oracle to recover the full plaintext of any sealed secret.

The POST /v1/verify and /v1/rotate handlers call Unseal() to decrypt target secrets, then render any Go templates found in spec.template.data.* using the decrypted payload as the evaluation context (pkg/apis/sealedsecrets/v1alpha1/sealedsecret_expansion.go). Errors encountered during template execution are directly reflected in the resulting HTTP response status codes.

Missing AEAD label binding: the spec.template.data field is omitted from the AEAD authenticated-data label binding ciphertext to metadata. As a result, an attacker can copy a target's valid metadata and encryptedData verbatim, satisfying AEAD decryption and label validation, while freely replacing spec.template.data with arbitrary template logic.

Side-channel oracle: template execution errors map directly to HTTP response codes. HTTP 200 (OK) indicates template execution succeeded; HTTP 409 (Conflict) indicates template execution failed (e.g. via {{ fail "..." }}).

By injecting conditional statements such as {{ if eq (substr 0 1 .password) "S" }}ok{{ else }}{{ fail "x" }}{{ end }}, an attacker receives an HTTP 200 status when a character guess is correct and an HTTP 409 when it is incorrect. This differential response leaks one character-equality bit per request, allowing full secret extraction over successive queries.

Attack vector & prerequisites: unauthenticated; requires network access to the controller's internal service port (:8080). Although this service is not exposed to the public internet by default, it is accessible to any pod within the Kubernetes cluster or via a kubectl port-forward connection.

CVSS v3
4.2
EG Score
4.2MEDIUMmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity42% × 45%
Impact severity (EG Severity): CVSS 4.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Check with the vendor for a fixed release; until one is applied, restrict network exposure of the affected system on your normal schedule.
EPSS PROB
0.4%
EPSS %ILE
34th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (4.2): severity, escalated by confirmed exploitation. This CVE's 4.2 is its impact severity (EG Severity), not escalated.

EG Severity
4.2 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Check with the vendor for a fixed release; until one is applied, restrict network exposure of the affected system on your normal schedule.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 15, 2026

Last Modified

September 18, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
No fix on record yet. Sources: github.
Web page

GitHub - bitnami/sealed-secrets: A Kubernetes controller and tool for one-way encrypted Secrets · GitHub

https://github.com/bitnami/sealed-secrets
GitHub advisoryMentions a patch (unverified)

Internal POST endopints leaks sealed-secret plaintext through a template-injection oracle in sealed-secrets · Advisory · bitnami/sealed-secrets · GitHub

https://github.com/bitnami/sealed-secrets/security/advisories/GHSA-qj4p-m373-p2wg

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 45× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  3. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  4. 2026-10-30 09:55 UTCOSV refresh
  5. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  6. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  7. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  8. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  9. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  10. 2026-10-25 14:16 UTCEG score recompute
  11. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  12. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  13. 2026-10-22 20:57 UTCEG score recompute
  14. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  16. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  17. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  18. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  19. 2026-10-18 03:27 UTCEG score recompute
  20. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  21. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  23. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  24. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  25. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
Show 57 more
  1. 2026-10-12 15:52 UTCEG score recompute
  2. 2026-10-11 19:36 UTCEG score recompute
  3. 2026-10-11 16:51 UTCEG score recompute
  4. 2026-10-11 14:14 UTCEG score recompute
  5. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  6. 2026-10-11 05:46 UTCEG score recompute
  7. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  8. 2026-10-10 05:15 UTCEG score recompute
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  10. 2026-10-09 04:51 UTCEG score recompute
  11. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  12. 2026-10-08 04:27 UTCEG score recompute
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-10-07 04:03 UTCEG score recompute
  15. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  16. 2026-10-06 03:39 UTCEG score recompute
  17. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  18. 2026-10-05 03:16 UTCEG score recompute
  19. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  20. 2026-10-04 02:53 UTCEG score recompute
  21. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-10-03 02:29 UTCEG score recompute
  23. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  24. 2026-10-02 02:05 UTCEG score recompute
  25. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  26. 2026-10-01 01:39 UTCEG score recompute
  27. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  28. 2026-09-30 01:16 UTCEG score recompute
  29. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  30. 2026-09-28 23:52 UTCEG score recompute
  31. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  32. 2026-09-27 23:26 UTCEG score recompute
  33. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  34. 2026-09-26 23:03 UTCEG score recompute
  35. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  36. 2026-09-24 21:47 UTCEG score recompute
  37. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  38. 2026-09-23 21:24 UTCEG score recompute
  39. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  40. 2026-09-22 21:01 UTCEG score recompute
  41. 2026-09-21 20:38 UTCEG score recompute
  42. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  43. 2026-09-19 19:52 UTCEG score recompute
  44. 2026-09-18 19:29 UTCEG score recompute
  45. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  46. 2026-09-18 13:20 UTCEG score recompute
  47. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  48. 2026-09-17 12:57 UTCEG score recompute
  49. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  50. 2026-09-16 12:22 UTCEG score recompute
  51. 2026-09-16 12:01 UTCEG score recompute
  52. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  53. 2026-09-15 18:33 UTCEG score recompute
  54. 2026-09-15 17:39 UTCEG score recompute
  55. 2026-09-15 10:28 UTCEG score recompute
  56. 2026-09-15 09:28 UTCEG score recomputeFirst assessed: 4.2 MEDIUM
  57. 2026-09-15 09:27 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-59341?
CVE-2026-59341 is a medium-severity vulnerability; its CVE record was published on September 15, 2026. A security vulnerability exists in the Sealed Secrets controller's unauthenticated POST endpoints. By submitting a modified payload containing custom Go template logic in spec.template.data, an attacker with internal network access can abuse the handler as a decryption oracle to recover the full…
When was the CVE record for CVE-2026-59341 published?
The CVE record for CVE-2026-59341 was published on September 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 18, 2026; the record at its source may have been updated since.
Is CVE-2026-59341 actively exploited?
CVE-2026-59341 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (34th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59341?
CVE-2026-59341 has a CVSS base score of 4.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-59341?
No fix for CVE-2026-59341 is confirmed yet. Until one is published, restrict network exposure of the affected system — for example, keep it off the internet or limit it to trusted networks — and watch for a fix. The CVE record's CNA (VMware by Broadcom) lists Bitnami sealed-secrets versions up to and including 0.38.4 as affected, and Bitnami sealed-secrets versions 0.40.0 as unaffected. No release containing a fix is confirmed on record.

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