CVE-2026-82402

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (37th 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
Trending — 3 sources updated this weekElevated

Also known asEUVD-2026-101576 (ENISA EUVD)Source: ENISA EUVD

5.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (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: 5.3Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

Gogs is an open source self-hosted Git service. Prior to 0.15.0+dev, an unauthenticated attacker can provide a backslash-containing target to the /redirect endpoint, and similar post-action redirect flows are also affected. internal/urlx/urlx.go IsSameSite validates a normalized form of the target while cmd/gogs/internal/web/web.go getRedirect and other callers use the original value in the Location response. This backslash normalization mismatch lets browsers interpret the Location value as a scheme-relative external URL, allowing links on a trusted Gogs domain to redirect victims to attacker-controlled content for phishing. This vulnerability is fixed in 0.15.0+dev.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100

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.
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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
37th
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.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 2026-10-28). 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.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).

The CVE record names the fixed release. Apply it within your standard update timelines.

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.

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

October 14, 2026

Last Modified

October 20, 2026

Advisory Details (4)

Auto-updated Oct 16, 2026
🔬 Proof of concept available. Fix named in the CVE record. Sources: github_commit, github_pr, github.
GitHub advisoryMentions a patch (unverified)🟡 PoC Available

Open Redirect in /redirect endpoint via backslash bypass in `IsSameSite` · Advisory · gogs/gogs · GitHub

https://github.com/gogs/gogs/security/advisories/GHSA-3g28-2vwg-gxq6
GitHub pull request

security: harden same-site redirect validation

Fix merged in gogs/gogs PR #8391 on 2026-07-16 — awaiting tagged release

https://github.com/gogs/gogs/pull/8391
GitHub commit

commit 0aa820e6d572 (gogs/gogs)

Fix landed in gogs/gogs commit 0aa820e6d572 — awaiting tagged release

https://github.com/gogs/gogs/commit/0aa820e6d572771551871c0b5f5f32dffc565e3e
Web page

gogs/CHANGELOG.md at main · gogs/gogs · GitHub

https://github.com/gogs/gogs/blob/main/CHANGELOG.md#0150dev-main

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 28× 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% · 37th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  5. 2026-10-29 14:43 UTCEG score recompute
  6. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  7. 2026-10-28 15:25 UTCOSV refresh
  8. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  9. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  10. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  11. 2026-10-25 13:58 UTCEG score recompute
  12. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  13. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  14. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  15. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  16. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  17. 2026-10-20 02:26 UTCEG score recompute
  18. 2026-10-20 02:03 UTCEG score recompute
  19. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  20. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  21. 2026-10-18 03:08 UTCEG score recompute
  22. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  23. 2026-10-16 20:13 UTCEG score recompute
  24. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  25. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
Show 3 more
  1. 2026-10-14 19:39 UTCEG score recompute
  2. 2026-10-14 18:56 UTCEG score recomputeFirst assessed: 5.3 MEDIUM
  3. 2026-10-14 18:54 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-82402?
CVE-2026-82402 is a medium-severity vulnerability; its CVE record was published on October 14, 2026. Gogs is an open source self-hosted Git service. Prior to 0.15.0+dev, an unauthenticated attacker can provide a backslash-containing target to the /redirect endpoint, and similar post-action redirect flows are also affected. internal/urlx/urlx.go IsSameSite validates a normalized form of the target…
When was the CVE record for CVE-2026-82402 published?
The CVE record for CVE-2026-82402 was published on October 14, 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 October 20, 2026; the record at its source may have been updated since.
Is CVE-2026-82402 actively exploited?
CVE-2026-82402 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-82402?
CVE-2026-82402 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-82402?
The CVE record for CVE-2026-82402 names the fix: "This vulnerability is fixed in 0.15.0+dev."

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