CVE-2026-25742

MEDIUMNVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.3% (25th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated

Also known asEUVD-2026-18835 (ENISA EUVD)Source: ENISA EUVD

5.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (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: 0.3%CVSS: 5.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Zulip is an open-source team collaboration tool. Prior to version 11.6, Zulip is an open-source team collaboration tool. From version 1.4.0 to before version 11.6, even after spectator access (enable_spectator_access / WEB_PUBLIC_STREAMS_ENABLED) is disabled, attachments originating from web-public streams can still be retrieved anonymously. As a result, file contents remain accessible even after public access is intended to be disabled. Similarly, even after spectator access is disabled, the /users/me//topics endpoint remains reachable anonymously, allowing retrieval of topic history for web-public streams. This issue has been patched in version 11.6. This issue has been patched in version 11.6.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
55
EG Risk 55/100

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)
Severity53% × 45%
Impact severity (EG Severity): CVSS 5.3 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.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
25th
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 (5.3): severity, escalated by confirmed exploitation. This CVE's 5.3 is its impact severity (EG Severity), not escalated.

EG Severity
5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS. 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; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.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; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

April 3, 2026

Last Modified

July 24, 2026

Advisory Details (4)

Auto-updated Jul 26, 2026
Patch available. Sources: github_commit, github_release, github.
GitHub advisoryMentions a patch (unverified)

Anonymous File Access After Disabling Spectator Access · Advisory · zulip/zulip · GitHub

https://github.com/zulip/zulip/security/advisories/GHSA-f47p-xjqq-g28w
GitHub release Patch Available

Zulip Server 11.6

Patch available: zulip/zulip 11.6

https://github.com/zulip/zulip/releases/tag/11.6
GitHub commit Patch Available

commit 41e23347b521 (zulip/zulip)

Patch available: zulip/zulip 11.6 (contains commit 41e23347b521)

https://github.com/zulip/zulip/commit/41e23347b5218b3b0397a55176c7d97396735bae
GitHub commit Patch Available

commit 3c0454142996 (zulip/zulip)

Patch available: zulip/zulip 11.6 (contains commit 3c0454142996)

https://github.com/zulip/zulip/commit/3c045414299680b9f5dca7d76cf6cef6121c0236

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 39× 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.

Showing the most recent 99 of 229 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 130 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  2. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  3. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  4. 2026-10-31 01:25 UTCOSV refresh
  5. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  6. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  7. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  8. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  9. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  10. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  11. 2026-10-25 14:39 UTCEG score recompute
  12. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  13. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  14. 2026-10-23 04:29 UTCEG score recompute
  15. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  16. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  17. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  18. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  19. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  20. 2026-10-18 03:52 UTCEG score recompute
  21. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  22. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  23. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  24. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  25. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
Show 74 more
  1. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-12 16:18 UTCEG score recompute
  3. 2026-10-11 20:01 UTCEG score recompute
  4. 2026-10-11 17:14 UTCEG score recompute
  5. 2026-10-11 14:45 UTCEG score recompute
  6. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  7. 2026-10-11 01:22 UTCOSV refresh
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  13. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  14. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  18. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  19. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  20. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-09-24 14:03 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  22. 2026-09-21 12:49 UTCOSV refresh
  23. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  24. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  25. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  26. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  27. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  28. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  29. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  30. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  31. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  32. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  33. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  34. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  35. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  36. 2026-09-02 10:14 UTCOSV refresh
  37. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  38. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  39. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  40. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  41. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  42. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  43. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  44. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  45. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  46. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  47. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  48. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  49. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  50. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  51. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  52. 2026-08-16 08:36 UTCEG score recompute
  53. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  54. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  55. 2026-08-14 05:41 UTCEG score recompute
  56. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  57. 2026-08-12 19:57 UTCEG score recompute
  58. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  59. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  60. 2026-08-11 05:10 UTCEG score recompute
  61. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  62. 2026-08-10 05:11 UTCEG score recompute
  63. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  64. 2026-08-09 05:12 UTCEG score recompute
  65. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  66. 2026-08-07 15:19 UTCEG score recompute
  67. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  68. 2026-08-06 00:18 UTCEG score recompute
  69. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  70. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  71. 2026-08-03 22:37 UTCEG score recompute
  72. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  73. 2026-08-02 14:34 UTCEG score recompute
  74. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.3% · 23rd percentile

Frequently asked(5)

What is CVE-2026-25742?
CVE-2026-25742 is a medium-severity vulnerability; its CVE record was published on April 3, 2026. Zulip is an open-source team collaboration tool. Prior to version 11.6, Zulip is an open-source team collaboration tool. From version 1.4.0 to before version 11.6, even after spectator access (enable_spectator_access / WEB_PUBLIC_STREAMS_ENABLED) is disabled, attachments originating from web-public…
When was the CVE record for CVE-2026-25742 published?
The CVE record for CVE-2026-25742 was published on April 3, 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 July 24, 2026; the record at its source may have been updated since.
Is CVE-2026-25742 actively exploited?
CVE-2026-25742 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-25742?
CVE-2026-25742 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-25742?
A fix for CVE-2026-25742 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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